But that also doesn't really ring true either because a "lack of profit" doesn't necessarily mean that an acquiring party will shut said service down either.
I doubt Friendfeed makes Facebook any money, and was clearly a talent acquisition (Bret is their CTO now) but they still keep it running.
You're right that anyone using any tool/service with an unsustainable model needs to be cautious. But there's a lot more to it then is being proposed by the OP.
They keep the lights on, but Friendfeed might be as well dead. The impression of activity is maintained by posts imported automatically from connected accounts, and the list of supported sites haven't been updated in years. For example, neither Rdio, Spotify, nor Grooveshark are available in the music section, same with Instagram and picplz in the photos section.
I doubt Friendfeed makes Facebook any money, and was clearly a talent acquisition (Bret is their CTO now) but they still keep it running.
You're right that anyone using any tool/service with an unsustainable model needs to be cautious. But there's a lot more to it then is being proposed by the OP.