For some reason hunters forgot their useless tokens from bounty and dont have idea anymore if their bounty tokens have some value. If you leave your wallet for quite sometime the easiest way to know this is to check your address on these two sites.
https://etherscan.iohttps://ethplorer.ioThe purposes of these sites are not only to see transactions but with the latest update and upgrade, we can see valuation of tokens under erc20 network that have been listed on coinmarketcap. You dont need to visit each channel or social media for update by simply looking on these sites you will know if your tokens from bounty have value.
You are right about the etherscan and ethplorer, but also they do not reflect the true prices of every tokens.
I think they pick their datas from coinmarket cap or there about.
Always do your own research aside the scan network, some are volumeless pumps.