-snip-
Clearly, OP's plan is not so well thought out.
1) There's the issue of using other people's identity (with no idea of how to pass KYC)
2) Publicly asking for ideas to overcome the multi-account policy placed by the casinos
There are many reasons why doing this is not advised. It is not something you would benefit from in the future, in fact, all you stand at is loss. Better to take the hint and move on...
Precisely.
Point is that OP probably has nothing to gain from having multiple accounts on sites that allow it (e.g., unregulated crypto betting sites that have ridiculously low limits and high risk associated with it), and everything to lose on sites that don't allow it (e.g. Bet365).
Your advice would be precisely the same as my recommendations - absolutely zero point in even trying to get stealth accounts or whatnot. Too much risk involved.