Well you can't move your BTC anymore, don't know why they disabled the wallet this early, it's a week till the split. Luckily I don't have much on bittrex.

People can just buy high volume altcoins, move them to a different exchange, and sell them for btc to withdraw.
Sure, they may lose 1-2% in the process (or not, if they make good trades) but if bcc is important to them, it's probably worth it

I have installed Byteball Wallet on many devices.Is it best to make every device with isolated wallet and address to increase my balance in next round?

wallet download linkis broken
https://github-production-release-asset-2e65be.s3.amazonaws.com/67414376/3406f2ec-6cf4-11e7-8eb1-9678cc5bfbdf?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAIWNJYAX4CSVEH53A%2F20170723%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20170723T201152Z&X-Amz-Expires=300&X-Amz-Signature=5fc95e7ebc090f2796d75c59fdd3eb767c5f209544a98a6ea74ba6e0783766f6&X-Amz-SignedHeaders=host&actor_id=10702131&response-content-disposition=attachment%3B%20filename%20Byteball-win64.exe&response-content-type=application%2Foctet-stream#42900232159686348

Yes, you need to link via Transition bot. Go to Chat and Bot Store, add Transition Bot and say hello to the bot. It will lead you further. You just provide byteball address and bitcoin address that you want to link. After that it will tell you how many GB you will get during the next distribution round.

After linking don't send any transactions, even to yourself, because it will move the remaining bytes to a new change address that won't be linked. Additionally if you are making a backup you need to do a new backup after every outgoing transaction. The reason is the same (bytes are moved to a change address that is not backed up). To sum up: after every outgoing transaction you need to make a new backup and a new linking.

Furthermore a new backup is necessary after receiving every blackbytes transaction because blackbytes are stored on a local device only. If you don't make a backup after receiving blackbytes you won't be able to recover them if you loose access to the device.

This is very important information. Thank you! I will back up my wallet after getting blackbytes from airdrop (I backed before I got blackbytes last time).

Yep, that statement is definitely inaccurate. Only linked byteball address will get 0.4222 blackbytes for every byte you hold on a specific address. Otherwise you will only get bytes if your address is not linked.

Some bytes are distributed to dead addresses. Addresses that nobody has access to, i.e. lost by somebody due to no backups. I think it would be better to distribute bytes only to linked addresses.