ARe all the EOS dapp developer known to blockone? EOSbet claim they were attending meetings with EOS.io
Not at all. In fact a lot of gambling dApp devs are working incognito. However, some of them do in fact attend meetings with Block.one VCs. That's true. I know devs from EOS Bet. They are all real people

IF they are into transparency, how come they are not showing their team on their website?
Is the possibility of some projects where the team is working incognito becoming a scam? Its an alarming now that the project is getting attention and are distributing EOS to BET holders. It doesn't happen to just this project but also to other platform that promises dividends.