I think that now it makes no sense to invest in altcoins
Nope, there are still a lot of potential altcoins to invest, when it comes in bounty, for you to assure that your time will not go to waste then the best thing you can do is to check if their coin is already at the exchanger then for sure you will going to pay all your work.
It's better than nothing,if the coins you follow and support doing some bounty jobs already inside the exchange you'll be assured that you will get good payout, instead of following ico's which no assurance being listed that can only lead you to a waste of time, be very furious when finding good project that already been catered from the exchange sites.