There will only be a problem if he tries to be 100% accurate day in day out. Apart from that, if the OP relaxes and decides to drop predictions daily as he places his own bets, we might have something significant in this thread. Predicting a single game daily is easy although it may not work 100% but if the match is carefully selected, we can see a success rate of as high as 70% which is a good record. Just that I love playing at least x2 so that one win can compensate for two losses.
There is every high chances of winning a single game per day if op must keep it up posting every single games, but then we don't have to capitalize on it that it must be winning at all time, as we know gambling has never moved or drift from game of probability to game of certainties. So, we can have 100 percent winning or also 100 percent losing because that is how gambling are designed to be, but we should also try not to generally rely on the game or even gambling with the amount we can't afford to lose.
I don't really think is that possible to win with single game per day, because gambling is not wordy to be trust no matter how much effort you put in bringing single game per day it most not surly be successful everytime. Because just like as you mentioned gambling still remains the same no matter how you predict, what would happen will still going to happen, no trees when comes to gambling.