[blahblaher]

That's not true though. Social network sites existed, just not so "centralized" and "viral". Facebook created a simple and more user-friendly interface. WhatsApp as it understand, does not make much if any money. Instagram is a cash cow due.

They have released some good open source technology, but as the OP said, Meta hasn't much going for it apart from addictive apps for showing ads

[karmakurtisaani]

They also had the right audience to build the early adopters: top university students.