Hmm seems like ive found it:
Exchange Support
Some exchanges have announced that they will support the token swap. Although using this method will undoubtedly be much simpler than registering the tokens yourself it also comes with its pitfalls.
It is highly likely there are going to be multiple networks running on the eos.io software that use the snapshot. It is highly unlikely that exchanges will support them all.
It is highly likely that exchanges will not support airdrops that use the snapshot.
Exchanges that have announced support for the token swap include:
Binance
Kucoin
Sources:
EOS.io
Binance Token Swap Announcement
Kucoin Token Swap Announcement
From reddit eos faq
No. 9