If you are so concern about this $100 minimim requirement, you can earn it in the fastest, and probably one of the safest way, is through playing slots. Normal spins will take some time, but if you bought a feature, it is much quicker and will save you some time (if you're really worried about that). It is enjoying IMO, just always expect for the worst if you plan to play with money.
Seems that the main concern from the first poster who start this discussion is about wagering 10x of the deposit.
Since the min deposit is $10 and minimum wagering requirement is $100, so perhaps it looks a bit too hard for him.
It is indeed a bit hard to wager 10x of our initial deposit but it is not that hard to wager $100 if we make bigger deposit.
But I cant agree if buy feature is one of the safest way to do as you may get nothing from buy feature and you may get bad losing streak with buy feature.
Buy feature is probably the fastest way but it is not the safest way obviously.
IMO the safest way to wager is to choose a game with lower house edge than slots.