It is true that what works for you might not work with the next person with you even if you are both sharing strategies and games with each other. Gambling is psychological and sophisticated to analyse when you are going to be profitable and when you are going to lose bet. This is something that can be very hard for any gambler to know even if you are using sure bet with high percentage of making you profitable.
You can share strategies, but the final outcome will ultimately depend solely on you. In slots, everything depends on your luck, and in betting everything depends on your skill in choosing bets. I think experience even matters in betting, because the more you play, the more you begin to notice patterns, or if not patterns, you begin to better understand the teams' motivations. I'll call this a player's experience, if a player is capable of improving, they should be better at betting, if not then they're doing something wrong.
