only if they transfer the SBD from the Steemian wallet to the minnow booster / smart steem wallet, if they use the internal SBD accumulated, there is no wallet memo..... not that I can see any
even if there is a link to the memo from the SBD, how would you correlate lets say my upvote done at the same time, it could be genuine, how would you know it's part of the bid upvote, there is no true timing correlation, they could use 2 accounts to give $10 or they could use 200 accounts to give $10, how would you differentiate on a popular post with 1000 different accounts upvoting
this is how the yel'pap does it he uses the shill minnow upvotes and let the view rackup from trending viewers who won't upvote to justify making it look instantly popular when it's really majority paid upvotes
i did appreciate your feedback about using that timing and memo, it's tricky to catch all these creative ways of bidding