“Inbox is an email company. Google is an advertising company. This product is our focus, and will not be ‘discontinued’ unexpectedly.” Burn! Very amusing. But for all we know they will be acqui-hired, maybe even by Google, and then shifted to a different project.
I said this in the other thread and I know it sounds cliché, but we're not planning to "go away" or get acquired or something. We've always positioned this company as a long-term play, and made that very clear when hiring, raising money, etc. It's just not possible to go after something big if you plan to "flip" the company quickly.
If you've taken VC money, haven't you already gave up that choice? Despite pretenses, the VCs are going to want: a) IPO or b) acquisition.
Since you assert b) is not your plan, do you really think you can become a $100m/year company (IPO) by charging for something that Google/MS/everyone else provides for free?
Perhaps I am too pessimistic (or realistic?) about VC goals/control.