"internal social media platforms" ??
Maybe avoiding "internal social platforms" would be a smart move at workplaces? The author of "The Circle" looks to know well how those silly companies are organized inside.
I'm used to stay away from any internal "social" group of any company I worked for - because work is work, and life is life. I stay away even from company parties, dinners or whatever as much as I can.
While a few colleagues are also friends, not all colleagues are friends, and if I feel I need new ones, I'll look for them outside the workplace, and whatever I do inside the workplace it's better to be professional stuff only.