EOS, I joined the bounty on the EOS platform and it turned out that the EOS wallet had to pay.
TRON, I once followed the bounty of the exploler TRON and the same as Ethereum.
Ardor ,was once, but the token had to be sent and the minimum feast was around 0.5 Ardor in the wallet. if Ethereum is a GAS.
NEO ?
Not yet , i hope next time getting bounty from NEO Explorer .