Does it matter which wallet we send the money to? e.g. Electrum, Blockchain.info, Mycelium etc.
blockchain will not link the private key to their owners so i wont be able to sign messages with the address even if i have the account
electrum can do it, i dont know for the rest
i have 400 btc right now, i can do that
how much can you pay for it, i have them stored in private key, so no big deal for create a broadcast message
i can even generate a vanity bitcoin address and then send to it, this will even make your service look legit