There are rumors that Bitfinex holds around 10% of the EOS tokens. There are just a few accounts that hold most of the EOS tokens. What does that mean?
Well given that EOS is based on voting it means that exchanges and other holders of EOS will be the ones that actually get to make the decisions. Block1, EOS developing teams, holds 100 000 000 EOS tokens which is quite the vote, but they created the tokens so hopefully they can make good decisions. What about Bitfinex and the rest of the large token holders? They aren't developers, they are in it to make money. Completely logical, but is that a good thing or a bad thing for the future of EOS???
bfx promises to enable a transparent voting mechansim for their clients. Binance and others have stayed silent. Yet voting with tokens that are not yours is forbidden under the EOS constitution, so if they did that, they would risk arbitration (which of course is not in palce atm)