~ poker is one of those things that become obsolete after some time. Not very quickly, same strategies can work for years, but still after 10-15 years they may stop working. This applies to online poker first of all. You can use some ancient poker strategy playing in your neighborhood, and it will be working forever if your opponents don't use the internet to update their knowledge.
Does that suggest that the "Poker Courses" that OP is selling might be obsolete? Because why would those "masters" share their secrets, unless they can make more money from selling them than actually using them? It's probably just the same with those unprofitable traders who sell subscriptions to teach plebs how to be "day-traders".
It is
very likely that this is the case here. I'm not trying to say that OP is a cheater or something, but I personally wouldn't recommend to anyone to buy his courses. It's not even about the money you'll spend on them. It's about your head littering with outdated information.
If we are not interested, we may not buy his/her. I get the idea of other users; there are chances that he's legit and not. So how can we tell then? I think if OP would show some things that would generate credit, it would be better to both parties. People will trust him more, and he will get what he wants to which is to sell his courses- matter of give and take right? I do really have an opinion with this one such as "why would good players sell their techniques if they can be rich by just using it?". But that would be generalizing so I hesitated. There are people who are kind so I hope he's one of them. The payment would or might compensate his efforts of sharing it, so it would still be a win.
So to those who are interested with OP's offer, you guys are free to test it out. You won't lose in an instant 'coz u can make an offer as well as a buyer such as 'testing' the offer right? then if it won't work, you may pull your interest out of it.