NO!
all those altcoins you see as free are actually shitcoins, 90% of the list consists of 0.00000001 amount of a shitcoin which is worth 0.00000001BTC or less which means 90% what you are claiming from their free list is worth 1e-16BTC
and since you mentioned PAC i have to say after checking it, it is a dead coin and it's value is actually a lot less than 1 satoshi, because first of all there is no buy order and only sell orders at 1 satoshi with nobody buying them and in other exchanges there is no bitcoin pair and the other pairs (such as Doge/Pac) is worth a very tiny amount.
in conclusion you are wasting your time even if there was a one time 2000 satoshi claim.
On this things you have a big point, Yeah your right most of the coin in yobit are 0.00000001
BTC, which means those coins in there are shit, but why yobit stand for years up to now? Because even is like that many of the traders in yobit still investing in the shitcoins because there is pump and dump happening. that's the reason why it takes long to stand firm now.