Do you noticed that there are many complaints recently about gambling sites blocking the accounts of some users. The user may have more than one account but maybe they do not read the terms of service before gambling. This is the ones that we heard of. There would be more than we did not know.
The first three gambling sites that I used which were local gambling sites, I did not read the terms of service. I use the same ISP to open 3 accounts for the first gambling site. I saw no problem because I lost money than win which makes me to to have a single withdrawal. Supposing that I won huge amount of money, they could have used multi accounting as an excuse not to let me withdraw the money.
It would be good for newbies and many people on this forum that are not even newbies to read the terms of service of the gambling site that they are using. Having more than one account is against the ToS of all or most of the gambling sites.
In most well established and reputable casinos this is common occurrence and they say pretty explicitly that having multi accounts in their site is strictly against the rules,they can let you use VPN in specific cases where you ask for permission before and tell that the country and IP you will be using plus the specific time you will be playing,other than that everything else regarding multi accounting is strictly prohibited and this is a well known thing between most gamblers,even newbies know that.I have personally never used more than one account per casino as I simply did not see the use case although I know a lot of people are doing that at Stake casino as I see tips of over 1000 dollars sometimes and nowadays it is difficult for someone to tip you 1000 dollars for nothing.
I can only think of one reason why anyone would decide to use multiple accounts for a casino site.
Claiming the free spins, bonuses and promotions might be the reason but other than that I can't think of any reason why would anyone need multiple accounts.
It's better to avoid such practices. Just imagine you win a huge reward but you are unable to withdraw just because you had an alternative account on the site.