There have been a number of similar startups and companies, so it's a stretch to assume that Google stumbled upon your company and decided to copy it. (Not to say they don't do exactly that -- but they target big proven markets, like Dropbox and Groupon and Facebook.)

It's easy to forget that at any given moment, lots of smart people are independently identifying a market opportunity.

The good news is that the revenue for Google will be so low it will likely be shelved when they put more wood behind fewer arrows. I suggest writing your "We're sorry to see Google Helpouts go, here's how to import your profile" post in advance.