I wouldn't say anything is definitely unless Binance makes an official announcement. I wouldn't count on them though, personally. It's better to control your own private keys than to leave cryptocurrency on an exchange anyway.
The issue with less than 100 EOS is it costs gas to send ETH transactions. eosDAC is only going to be dropped on addresses that actually have enough EOS to make it worth it. Those with less than 100 EOS can still get their eosDAC tokens, but it will be more of a manual process. You can check the website for more details.