Bounties are always the great way for new user to know more about the project. I guess that a significant number of users stay with the project after bounties ended. Also, i am very surprised because Qtum paid bounties with bitcoin. Usually, new altcoin and ICO has been pay for bounties in your currency.
I dont think so, when iam still new in jr member, i apply to signature campaign and had no problem with that, and knew bounty after that. Ya i agree with you its so rare for new altcoin paying their bounty with BTC, but its good thing though for most of user who love the bitcoin payment
They could always pay a small % of the sig campaign earnings in qtum, to make it more popular among bitcointalk posters.
Think what would happen if you got $20 worth of an altcoin from someone, you wouldn't want it to go to waste, so you'd download the wallet, register to an exchange and start checking the price, you would get involved. If you dumped it, your choice, it wouldn't affect the price even if 100 signature posters like you did the same.