The level of sketchiness is determined by the percentage of crowdsale funds AND total EOS tokens that ultimately go to the developers. Timeframe is another issue. As developers it would be advantageous if there were no ability to short the tokens. They should be required to vest or lock the token to demonstrate long-term interest in the project. When the people involved in the project recycle ICO funds to then buy equity and then short it for gains in a native token on the competing platform, it doesn't demonstrate good project morale. Another thing to consider, is that as developers, are they already getting a percentage of total tokens, or not? If so, then that means they would be double dipping on every investment.