I use Mailbox. I like it to do the normal, read/archive thingy fast. But for serious mailing, Sparrow still wins. Aside this, it was clearly normal to see them

I use Mailbox. I like it to do the normal, read/archive thingy fast. But for serious mailing, Sparrow still wins. Aside this, it was clearly normal to see them acquired by other grande company. Mailbox was free. No business model. Their own business model surely was acquisition. Did you thought they were last to the point of an IPO or charging for their service? Me not.