I'm a little concerned that it isn't viral and/or paradigm-shifting.

It probably is viral and paradigm-shifting too, based on the description. It really is the perfect startup - hits every buzzword, founder with a previous exit, all-star team, etc.

Too bad startups aren't checklists to tick off.

Maybe after they pivot.

They forgot group buying.

Actually I think they talked about that too "it eventually plans to offer businesses a self-serve platform for running deals"

No wonder they invested $41 million… It's the perfect app…

Heh. I believe the VC-approved word for this is 'solomo'.

After trying hard to understand their idea, I think you just delivered the best explanation. They even mentioned the possibility to integrate "coupons" in their system!

entrepreneurgasm!