I use it to keep in touch with distant family and friends, and for the messenger, and find your assertion hilarious. Even if the twelve Firefox extensions blocking and sandboxing the hell out of it will somehow fail, so what? A toaster ad will keep following me around for weeks on end, and won't be seen because of ad blocking? Or maybe the very valuable insight that I subscribe and sometimes like my city hall and my local cafe's Facebook page will be used to target me with fascist advertising and bring down our democracy? Give me a break. It's a perfectly acceptable compromise for the marginal convenience of having a bunch of contracts in one place.