Thanks for list though but when comparing all these upcoming exchange airdrops to that Uniswap and even 1inch, a big difference is spotted, first they didn't announced it hence allowing them the ample opportunity to reward those who put in their best, but for some that already announcing it, the end results would be more traders for the sake of the airdrop and lesser reward. Also, it could be those exchanges are looking for a way to boost their trading volume and this airdrop scenario has offered them that, but another question is, are they really reputable exchanges like their counterparts and will they deliver as anticipated. Nevertheless, no harm in trying but let's endeavour to make sure it is worth it.