Apparently they have been living on life-support.
I can't claim to fully understand how it worked, but apparently as long as sites could show user growth they could attract investments, but with inflation causing interest rates to go up (and other economy hocus pocus) , that money is quickly drying up.
I don't know if the investors believed that if the user base could grow large enough, someone would buy the companies, or they suddenly could come up with some fantastic monetization of said user-base.
Now as companies are listed on the stock exchange, and facing the falling investor interest, they are expected to react (aggressively) to secure future revenue.