So, OP, what's your opinion on this?
hey dev ,how about making a jackpot?
for example the btc address to send more payments from now on ,receives a premium of 10 Btc at the end week
the fees generated by the deposits would be sufficient to pay the premium
just my 2 satoshi

It could attract more deposits. If not 10 btc, then you could give him the 250% or maybe even 400% bonus on his largest deposit. It'll be like a raffle and the deposits are the "tickets", so the more you deposit you get more chances of winning.