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I have no idea. I happen to check on where a username is registered and found that it was and the 100 WEKU from that account has been transferred to @bot
So, we know where the @smart money came from.
Then I looked at https://deals.weku.io/@smart/transfers
Well, at least now we need SMS Verification for registration which could be why @bot has not been getting WEKU from new account.
In case you have not heard about SMS Verification, read this post:
[Announcement] Phone SMS Verification implemented