There is no way to whitelist new tokens after the ProxyFactory contract is deployed and also no way to remove existing tokens from whitelist in case there is some issue with the coin in the future.
In case the particular erc20 token got hit by some issue then it will lead to loss of the winners.
Medium
Manual
To make functions which allows whitelisting and blacklisting of tokens.
We can also use a voting mechanism for it.
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