Well i dont know how are their finance and even know how many people into this signature all i can say and show is if yovi has a 40btc trade volume they get 0.08btc daily from those volume,meaning that they earn somethin like 2.4btc montly ,that is more since they have ico starting and ending,somedays we see big values like 100btc soo dont be worry sure they are control the income and the wages,i doubt those problem at blue button will affect this signature that is a long time running already,and is one of the best since there are daily payouts and the value of post didnt change as the price changes as happening with other signatures.
Yeah I agree there is no problem with their finance I think

All I can think of is that they just send some to the wallet so that it won't run out fast or maybe so that they can control the money they put in for signature campaign