They have announced more than 10 airdrops. Apparently when projects want to list on ProBit Exchange, the projects will have to airdrop their tokens to PROB token holders. This way, I see PROB tokens as a good way to collect payouts, which gives me passive income for my investments.

I have collected XPX, LYL and there are STIPS, HERB, KEY and 10+ more airdrops announced. ProBit Exchange does not charge listing fees, so I expect there to be many many more airdrops.

The airdrop information is below. They have delivered every single airdrop they've said they would.
https://support.probit.com/hc/en-us/articles/360022453511--BREAKING-NEWS-12-Rounds-of-Airdrops-Await-PROB-Holders-

There was once they gave out airdrops worth more than US$100k too. Definitely one of the best new exchanges around. Their business model seems to be more refreshing then other exchanges just listing shitcoins.