I think you need to give a stock to bumbacoin users like airdrop, signature campaign, facebook and twitter bounty.
if Can bumbacoin market in bittrex coinexchange
In the past month bumbaporn has given away 12513 BUMBA
Touchmycoin has given away a few thousand, I don't have that number easily handy.
Free BUMBA is not hard to get at the moment!
However I will be adding another faucet soon that will reward stakers by giving away transaction fees that are equal to the current price in satoshi. So 150 satoshi price will give away 150 BUMBA in TX fees.
This is harder to automate than I thought, there is no simple setting to give exact tx fees in the command line client.