Being a junior member don't you think you would need to show people your prediction skills for a hell of a lot more than 10 games before charging the money. Some pickers will get free pics for months before charging a subscription fee. Even if you go 10 for 10 I still wouldn't purchase the pics, it's just not enough information
Actually we are on bitcointalk and not on a betting tips website and my junior member status does not matter. I'm in sports betting business more than 4 years.
I play only on pinnacle.com, because it's the only one bookmaker who is not blocking accounts and limiting bets. Betfair used to be the good betting exchange, but after it was sold to paddy power it became the worst place for betting. Bet365 is also good and william hill is doing just OK. For betting strategies I usually use martingale and sometimes fixed wager. If you have more questions I will be happy to answer.