So…are you fishing for interest/validation?

I don't mind it, just put it upfront that I'm not getting anything in exchange for my email address. Thought I get to try out the product but I'm just on a waiting list.

Then I'm asked to share/spam it, something that I have not tried/vetted, with my social circle?

I'm very interested in the service, just tell me upfront you're only collecting emails for now.