How Do These Pros In The Forums Develop Their Winning Systems??

My second, main point, is how do these people who are up $50k in baseball, or in football, develop these winning systems?  I would love to know how they do it.  They're legit, because I follow them every day for about 2 years, and I know they aren't lying.  There's a  handful or 2 of good cappers.  I would seriously pay a couple $$$$ just to speak with them, and ask how they've developed their systems.  

I can pick, and guess at games, and sometimes I'll win and sometimes I won't.  The only reason I win at games is because I follow my 'Select Few' as I'll call them from here on out.  I feel bad that I have to follow the professionals, but they produce so I can't possibly jump off a winning train.  I just wish that I could understand how each of them do it.  How they developed their systems, and how long it took for them to figure it out.  

If anyone can provide some serious insight, I'd appreciate it and I'm sure a bunch of other people would as well.  Real talk only.  GL to all, and make that $, which is the whole point of this game we play.

I would advise to stay away from tsi sports picks, as all they do is chase and lose.  Losing a 4 game chase and a 3 game chase last month wiping out their bankroll, although they will never admit it.

most likely use covers stats and go back 5 or 10 years by trial and error.

a system begins by you noticing trending in results. Then all you have to do is back test it. Reality is that all games have 50% chance of going either way. That is where and why you start playing series which brings in the Probabilities and percentages factors. Backtest and presto. If it wins roughly 85% of time oor more then apply money management system to it to make it the most successful. I like to call it studying. If I didnt read stats I may never read at all