It will be a great idea for Yo-Ex to introduce a faucet where its coins will be earned freely too. It will equally increase the level of awareness just like this signature campaign is doing.
You want yobit similar faucets for earning on daily basis ? Have you ever got chances to withdraw the coins you had received from faucets ? But unfortunately I never made any satoshi out of them. I remember I tried to convert some free altcoins but I got error message of trading volume less than 10k satoshi is not allowed.
I believe faucets on exchange is not a good idea unless otherwise there will be an option to play dicing.