1. Microsoft/Facebook (and maybe more corporates) didn't play by the rules. They don't believe in "give and take", they just do "take, take,..". Google didn't like it so walked out. Instead of showing the sportsman's spirit and instead d of carried on despite of all the follies they simply left having pissed off. Good decision.

2. Universities, organisations? The number is too small to be bothered about, esp when compared with the likes of the two above^. They would rather innovate and try to lock-in users into their own platforms rather than hoping someday Cuck might turn the benevolent saint.

3. Whatever you say but unless you are short of manpower and talent it's actually easier difficult to innovate in-house sth proprietary and not when you've to conform to a "standard" and that too when the rewards are [1].

4. Even I don't like the move but it was a business decision and this one made a lot more sense than killing off GR.

The surprising fact here is, we hardly see anyone criticizing the providers that chose not to share back. We, keep on saying "no problems with XMPP" and "even though MS and Fb were not giving back, Google should have just let them free-load after all it's a do no eveil corp". Huh.