I have heard (but these are unverified facts) that even Binance made a free listing for some coins because he considered them promising developments in the field of crypto-currencies.
Exactly!
But it's hard to surpass all of their requirements to get free listings on Binance.
At first, big community needed to do votes.
Secondly, high daily volume.
Thirdly, really active project shown via products, activity of XDNA team.
And a bit more thing.