That is to the best of my knowledge.....Best approach would be to contact them and make sure it is the correct approach. The mainnet isn't up yet....but if they're losing all their volume on Open, you should check their site for updates specifically addressing what you brought up and EOS.
ps. Keeping your coins on any exchange means you will only be able to obtain the airdrops that they decide to allow you to obtain, or in the case of EOSDAC, they actually started trading the coin. Essentially, they are in control of your wallet, and what you can do with it. Registration was not terrible, and it's a good thing to do to better understand some of the workings of blockchain. Register you own private wallet if you want full control of your possible airdrops. To this point, no exchange has announced support the massive amount of airdrops that may occur. They may get them....and you may not....who knows? Holding your own coins is always best when not actively trading them.
RE: Telegram Bots Might Be Your Faster and Easiest Way to Obtain EOS dapp Tokens