My personal thoughts:
I'm glad to hear it seems like there is at least some attempt to credit lottery wins-- if that really goes away, it would seem to be an indicator that there is no longer at attempt to keep the wheels on the track. For practical purposes, it's also gone if they don't get the app back in the Play Store.
Everyone has their own opinion on whether or not there was ill intent involved here, and I don't see any point in arguing that again-- my personal thought is that there was not, and that businesses can fail regardless of good intentions. (And I know the ad delivery networks have been suffering through lots of problems in general of late, not just CellNuvo.)
I'm happy enough with what I've gotten through CellNuvo-- close to 3 plan/years paid for on our primary phone plans, and probably a couple of years of backup/emergency lines. I'd be happier if I'd gotten the new phones we'd been working on, too, of course.
But I knew it was speculative when I was swiping. My original intention was not to build up more Gold than I could easily redeem in a few months-- I exceeded that because it was easy, and better than twiddling my thumbs. I had almost no otherwise "productive" time invested in swiping.
So for me, if CellNuvo manages to recover, I'd use it again under my original intent of not getting too invested in accumulating Gold beyond the rate I could easily redeem..
There was great value when CellNuvo credits could be used for cell service, less so with the gift cards, and likely no value now.
I agree with KentE that I have been happy enough from what I got from CellNuvo in the past. I probably had too much of a balance, as KentE says, because it was so easy. It is all but impossible to gather more than a few silver in a reasonable amount of time now, with the app requiring useless clicks. You have to keep remembering that silver has no basis in actual cash at this point based on recent actions (or non-actions).
I am no longer active in the app, but will stick around here because I am interested to see if we hear anything before the website gets taken down.
It was fun while it lasted. Just like RingPlus was. Just like FreeUp may be heading. Funny how FreedomPoP, the most user unfriendly of the freebies, actually lives via Ting and Red Pocket. CellNuvo probably squandered its user base by abandoning it, although all the pending silver probably made it cost prohibitive for anyone to take over.