An online casino will consider you to be guilty of bonus abuse if you do one or many of the following:
Register multiple accounts to claim a bonus offer many times
Attempt to claim more than one bonus at a time
Claim multiple bonuses or stack bonuses before meeting the wagering requirements of the first bonus claimed
Switch from games with low wagering contribution to games with high wagering contributions after winning a big prize just to satisfy the wagering requirements faster
Place bets larger than permitted
Continuously use gamble feature or double up feature to increase winnings
Decrease bet size by 60% or more immediately after winning a prize just to clear the wagering requirements