Where are from you get 77 percent on your data? Does it mean if the dev has founded 77% of ethereum supply? You must make more explanation for your accusation. That doesn't look strange in my opinion. but i don't believe the dev has 77% of supply.
Assuming that's the case.I do not see anything wrong if the developers have a large number of coins.This has no negative impact on the ethereum ecosystem.And in General, how can you accuse such a platform of fraud.If it was so long ago, everyone would have learned that they were scammers and no one would buy their coin.
That's right mate difficult to accuse need contrete evindence to avoid fuds and to avoid people heard some bad news to create panic specially the newbies want to invest in ethereum or any altcoins. And ethereum is useful as new digital money to use for payment to buy goods or pay bills.