Yup. Acquired for $101M then subsequently shut down in 1-2 years (just kidding of course).
I don't know if it's in my best interest to answer this publicly, but screw it. The honest answer is I'm not entirely too sure, but an acquisition is always on the table for any startup IMO. I think whenever you ask a founder, "If someone offered you $100M, would you take it?", it's a pretty loaded question.
There's really three outcomes to a startup: They die, they get acquired, they IPO. The thing is, if you think your company is valued at $1M and someone offers you $100M, of course you're most likely going to take it. It's 100x what you were expecting and it would be unwise not to take it. However, if you deep down believe that your company is worth more or can be worth more than the offering price and you have the proof to back it up, then it'd be unwise to take the offer.
For me, I strongly believe that email has A LOT to go. I mean, it's nearly 2016 and I still can't connect my Dropbox to my Gmail app client or send stuff into Evernote / Trello? Given all the time we spend on email, shouldn't we at least have some better automation / AI integration by now? Something smarter and more contextually aware that can make my life a bit easier?
So many people use email in the world. Literally everyone that has a Facebook account has to have an email account. I think the reason why we haven't seen a billion dollar plus company yet is that it's very ubiquitous and it's hard to build solutions for the masses. So companies give up, sell out, close down, and then we have to start again at ground zero.
So to your question, what's the end goal? Well, if we're right about our beliefs, hopefully we can become the next billion dollar company. If not, then it's the other two options: get acquired or die. Which one will it be? No idea, but we're just working our butts off right now.