People throw around “credit card hacks” like it’s a category of internet tips you read once and forget. But some of these are genuinely worth knowing, and a few of them — specifically the ones involving authorized users and tradelines — I’ve been running as an actual side income for years. So here’s my take: the stuff that works, the stuff that’s more trouble than it’s worth, and the one thing I’d tell someone just getting started.
[Related: buy tradelines from us or read the resources section below]
Credit Card Churning: The Sign-Up Bonus Game
Churning is the practice of opening credit cards specifically to collect sign-up bonuses — usually cash back, points, or airline miles — then canceling or downgrading before the annual fee hits. Done well, it generates hundreds or thousands of dollars a year in rewards with minimal out-of-pocket cost.
The catch is that it requires active management. You need to track minimum spend requirements (typically $3,000–$5,000 in the first three months), keep the card open long enough not to look like fraud, and not carry a balance or you’ll lose the math game entirely. The r/churning community has done the systematic work of tracking which cards are worth targeting — it’s a rabbit hole, but a useful one if you want to go deep.
One thing churning does have as a side effect: you end up with a lot of open credit lines, which can lower your overall utilization ratio. That’s generally good for your score. The hard inquiries from each application do ding you a few points each, but they fall off after two years. (I’ve been as high as around ten hard inquiries at once. Not ideal, but the world didn’t end.)
Manufactured Spending: Meeting Minimums Without Actually Spending
Manufactured spending is buying something that can be quickly converted back into cash — prepaid gift cards, money orders, etc. — primarily to hit a spending threshold on a new card. It’s more effort than it sounds, and the loopholes keep closing as issuers and retailers figure out the patterns. Some people turn this into a part-time hobby. Others spend two hours at a drugstore buying Visa gift cards and decide it’s not worth their time. I’m in the second camp, personally.
Card Stacking: Using the Right Card for Everything
This one’s genuinely useful and doesn’t require any cleverness — just setup. The idea is that different cards reward different spending categories. Some give 5% back on groceries, others on gas, others on travel. If you use the right card for each category, you consistently earn at the highest rate across all your spending.
The downside is complexity. Managing four or five cards means four or five payment due dates, four or five statements to monitor, and four or five opportunities to miss a payment. The rewards are real, but so is the organizational overhead. If you’re not someone who pays close attention to accounts, one missed payment will cost you more in interest than a year’s worth of optimized cashback earned.
0% APR Offers: Actual Interest-Free Financing
Introductory 0% APR periods on purchases or balance transfers are one of the more underrated credit card features. If you have a large purchase coming up — appliances, medical expenses, whatever — using a card with a 12-to-18-month 0% intro period gives you essentially free financing. Divide the total by the number of months and pay that amount each month, and you pay zero interest.
The key is not to forget when the promotional period ends. After it expires, the rate jumps to the regular APR, which can be high. Set a calendar reminder for two months before expiration so you have time to either pay it off or transfer the balance again.
Selling Tradelines: The One That Became a Real Business for Me
This is the one I know best, because it’s what I actually do. If you have well-seasoned credit cards — meaning cards that are at least a couple of years old, with high limits and clean payment history — you can sell authorized user spots on those cards. Buyers pay to be added as authorized users for a billing cycle or two, the positive account history shows up on their credit report, and you collect a fee.
Brokers like Tradeline Supply Company, Boost Credit 101, and Coast Tradelines handle the buyer sourcing and the compliance framework. They take a significant cut — roughly 70% of what the buyer pays — but they handle most of the logistics. After doing it through brokers for a while, I also sell directly through my own WooCommerce store here at kindoflost.com, which lets me skip that broker cut entirely.
A few things worth knowing if you’re considering this as a seller: issuers like Capital One, Barclays, and US Bank tend to be stable for this. Bank of America is risky — they’re known to close cards and even related accounts if they flag tradeline activity, which happened to me with a $40,000 card. That was not a fun day. American Express is generally not worth listing because since around 2015 they report the authorized user’s add date as the account open date, not the card’s original open date — so a 20-year-old Amex looks like a brand-new account on the buyer’s report.
Buying Tradelines: The Buyer Side
The flip side of selling is buying. If your credit file is thin, has some age issues, or you’re trying to get approved for something specific (mortgage, car loan, apartment), buying an authorized user tradeline can help move the score. What matters is the limit, the age of the account, and the payment history — not the brand name on the card.
A $25,000 Capital One card from ten years ago with perfect payment history does exactly the same work as a $25,000 Chase card with the same profile. People pay a premium for Chase because of brand recognition, but once it hits the credit report, the issuer name doesn’t factor into the scoring model. If you want to see what’s available, you can browse current listings here. We also have a FAQ on how the process works if you have questions about timelines, posting, or what to expect.
Resources
We have a list of tradelines for sale, a tradelines FAQ, various posts about tradelines, and a tradeline pricing chart comparing competitor rates. A contact form is there if you have questions.
Please feel welcome to ask any questions below.
Related: best time to apply for a credit card — worth reading if this applies to you. Related: Credit Hack — worth reading if this applies to you.
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