It is correct that gambling site offer welcome bonus to attract users to their site but that doesnt mean that we will create multiple acciunts on their site besides that we should create unique accoubt and refer friends and family. If we create multiple self account then that will not be helpful for them as a result they may lock all of oir account.
Aside from being caught and freeze all the account. I think it’s useless because casino welcome bonus often have a high wagering requirements which is extremely hard to complete.
You can add the max win on the bonus set by some casino as extra hurdle to avoid being abused the bonus by multiple account users.
Casino is prepared on worst case scenario.