Why all of a sudden tech companies are not being favorable to their users?
YouTube disallowing adblockers, Reddit charging for API usage, Twitter blocking non-registered users. These events happen almost at the same time. Is this one of the effects of the tech bubble burst?
Not really "all of a sudden", this has been a long process. The often repeated enshittification thing is fully valid. The short version is:
start out
grow and expand as much as possible
bring in advertisers
make everyone depend on your service
abuse your powers, since everyone "needs" your service
Google, Amazon, Facebook, Twitter are the more obvious culprits, but every big tech company does something similar, one way or another, even hardware companies like Intel or Nvidia
nVidia was very popular as the scrappy upstart during the Riva128 and TNT/TNT2 Ultra days. Their popularity with users was very high at the time. Enshittification really got started with them during the early Geforce days and just spiraled around Geforce 3. When they got their asses spanked by ATI with the R300 series they had to de-shittify for a brief time.