@arebelspy , could you tell us how much you've been making via tradelines the last few years?
Ditto with others. It's a very, very, very long thread to slog thru, and I would love some summary info to share with others.
Low five figures.
The wife and I have a lot of cards enrolled between us.
From talking to other Mustachians, it ranges from a few hundred to a couple of people similar to myself. Average (for those getting sales) is probably a couple thousand, from what I've seen.
It very much depends on how many cards you have, and how desirable you are.
For a broad rule of thumb, without knowing anything about the ages, card types, etc., I think it's reasonable to assume 1-2 sales every 2 months per card that is at least 3-5 years old (a lot older, and you'll see closer to 2+ reliably, younger more towards 1). Times, say $150 per sale (assuming a 20k limit or so). That leaves you with 150-300 per two months times 12 months a year = $900-1800 per card per year.
If your card is newer, or lower limits, cut that in half or more (since the amount when you make a sale is half as much, plus you'll make them much less frequently). Say $300/year for a weaker card (a handful of sales at $75 per sale)?
Times the number of cards you have. 2-3 strong ones, and a handful of weaker ones should net you in the 4-5k range. If you and a spouse can each do that, you get to the low five figures pretty easily. Not a bad supplemental FIRE income, for almost no effort.
The key though is that the amount of work is so low--the dollar per hour is great whether you see a few sales or a lot.