As long as the token isn’t cheaper than the crowdsale price or as long as there are promising “updates”, there has to be no answer. Example (not picking, it’s just as an example): screenshot from this post:
To be fair, not every project must have revenue. For example when I bought into MAID, I didn’t expect any revenue (I did hope to cash out with some profit).
But that should be stated up front, IMO.
As far as Slock.it is concerned: pleeease! Uber is getting molested everywhere they go and it’s just freaking cabs.
This thing - if it ever takes off which I doubt - will be subject to bans and Gestapo oversight by the authorities.