What was my list building mistake? Sending leads directly and not making one.

To have sent thousands and thousands of paid customers as a super affiliate for some programs, and never collecting those high value leads myself, by giving them useful bonus offers. It's incredible how much money you can loose when you forget a single important step. A few years ago I realized what I was missing but even so I didn't reacted right away, the usual procrastination problem. I don't regret that...

For years I would only buy domains for my immediate projects, missing many precious gems that are now worth 6 and 7 figures. But who knew that they would have such a value today? Few people had that vision... and now reap the rewards.

Today I can say I've invested almost 7 figures with them, slowly building businesses on premium ones and using others to support them.
It's no easy money, far from that, and a slow process, but it's solid development, one that will bring revenue...