If you are using shared proxies you are done for,
If you are using normal sock 5 proxies you are done for
If you are making too many accs on 1 IP, you are done for
If you are botting the accs on another ip than you created the mail you are done for
and a lot more... everyone of these makes you look like a bot farm or a bot
their anti botting on tut island aint good, it's the flow of you making the accs that flags them and gets them banned before/on or just after tut island
You can even try to do 1 by hand and you will see it gets banned without botting it if you make any of those mistakes