Vimm has instant account registration so there's no reason you couldn't get large numbers. The only reason you need a Steem account is if you want to use Steem specific features like payed upvotes and broadcasting your stream across the Steem ecosystem to all your followers there. Gotta love that one account across all dapps thing. :) Something that will be missing from DLive going forward, you have to start building up your following from scratch again.

At least that's how I understand vimm. Haven't tried to do anything without my Steem account myself though.