Agreed it is a step too far, but is an important & needed step at this stage for crypto currency in general to move up the scale. Kudo to Electroneum team !!!
I don't think they are scam, their white paper looks pretty good, the team looks good, the product is on Android now, IOS is being reviewed by Apple (Richard said after ICO it should be up & running)
How much you put in (BTC & ETH)/2= Electroneum. Just kidding, just put as much as you are willing to lose (eventhough the chance of losing is slim here) . Put the $$$ to support the project, don't think in terms of how much you will get back (cause maybe you'll get nothing back).