keep in mind ETH currently is almost x100 the price of AMP infact.
and ETH was selling at over 50k in the ICO when they had nothing to show for it (apart from Vitalik's reputation)....at least Synereo has some tech on github which people can try out right now.
obviously at the moment there's a component of risk....but without risks there are no gains...I personally think the Synereo team has what it takes to deliver on its objectives, though I hope to see the dev team expand. I guess that's what this crowdsale is for.