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so assume if a user wagers with one account all time and level up so that he gets better Rakeback %.
assume someone creating a brand-new account all the time and all these accounts are low level so less Rakeback bonus.
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Or you can simply send a tip from your brand-new account to the main account. This will not be visible on the blockchain as it is an internal yolodice transaction.
This way, you can hide your deposits from the outside while retaining the ability to level up.