Expanding the !rain !tip system to include the ability for players to send vouchers that can be claimed as many times as the sender wishes. An example would be
!voucher 5 doge 5x
Voucher could then be claimed to the first 5 players to enter code with ea receiving 1 doge ea
How about making the amounts of times earning VIP on a particular coin an additional faucet level. Also listing it as a stat in the player's info page would be cool.