even if you find some place with wagering requirements that low (10x), in my experience those numbers are misleading as they don't count your wager at 1:1. and if you do the math you will find the real wager needed is much higher than what is advertised.
In my experience, and I might be wrong, most online casinos count wagers on selected slot games at 1:1 when you are playing through your welcome bonus. It's usually other types of games that contribute less to the wagering requirements. Usually, it's table and live dealer games that count anywhere from 5% to 20% or more. It's even common for some casino games to not count at all and not be allowed for wagering your bonus funds.