This really looks like a some kind of a scheme. Only reason someone would be interested in buying this start-up is for collected emails (They openly acknowledge

This really looks like a some kind of a scheme. Only reason someone would be interested in buying this start-up is for collected emails (They openly acknowledge that in their terms of use). So in essence, at best, people joining provide all the value, while getting at best marginal benefit later on. At worst, this is going to be scam with millions of auto generated emails joining diluting real value (And scamming anyone that would be silly enough to purchase this `startup`).