I believe that everyone here knows this way, so I think your share is superfluous. Also I recommend that you follow the telegram channel of the projects because they regularly update the information there, if the token is listed then surely they will have a full notice about it.
Not all, you are not sure cause some newbies who just started to do some bounty are probably not aware of this process at least I referring to those who have not know this. This is also a reminder for some people that forgotting their tokens on their wallets. I know its better to have an update on telegram but we cant deny that some are busy on our real life and dont have chance to look up and back read.
By this way we can do a check for a short period of time. Or also check on the coinmarketcap maybe the tokens got listed.