[skewp]

From the comments I've seen, their definition of "selling out" meant just selling the name and technology but not keeping their own dev team together or continuing to work on their plans as they were. Therefore they don't see this acquisition as selling out because they're keeping the team completely intact and continuing on the same plan as before (only expanded/expedited due to the influx of capital). They already saw themselves as beholden to their investors, so being beholden to one big investor (Facebook) doesn't seem much different to them.