Normally, rogue online casinos will easily call you a ‘bonus abuser’ just to have a reason for them not to payout any winnings you have. This occurrence is rare and unfortunate, and it is something you should really avoid. Only choose the licensed casinos that have the eCOGRA seal of approval because you are sure they are reputable. If you do this, you are ensuring that they have an open dispute channel in case there is a case against you even if you are innocent.
If there is a dispute about the bonus abuse, always contact the customer support to make any clarifications about the issues. After that, check the T&C and other correspondence that you may have with them about restrictions to make sure you are not violating any of them.
In case you are unable to resolve it, you can go further by contacting eCOGRA to file a complaint that they will investigate on your behalf. This will let you take advantage of the consumer-watchdog group as a way to settle disputes with the casinos that are part of eCOGRA.
Online casinos give rewarding bonuses and it could benefit you a lot more when you play on your favorite sites. Although, make sure that you are part of a bonus contract just like entering a legal contract. Read and understand the T&C and always keep your side of the deal, especially if it is about casino bonus abuse. If you accept the offer they give, play honestly and make sure to follow all the rules.