I don't think C-36 changed those aspects but the internet and accessibility did. Yes in early 2000 the internet was there but not as well "known" or spread as now. For instance i remember in late 90s staying at school after it was over for the 1h computer lab fun. Even around 2001/2002 i would go to the public library for for my computer fun. Still remember my first computer, an old thing that was given to me by my aunt with windows 98...

It was around 2005 i think that i finally got a decent machine with high speed internet (that had just been put in my small town)
Anyway sorry im going a bit off topic but my point is that even if news paper ads where not "banish" i doubt they would be as popular today as they could had been back then.
BUT i dunno if its C-36 or simply the fact that the peoples don't find them as usefull as they used to, but i feel there is less reviews in general than 5-6 years ago. And one thing especially, there seem to be less emphasis on details. For instance i find it much harder now to find cim/cof providers as before. And no i can't just ask... Some indies don't like to that about that in mail and agency seem to avoid answering those questions by text (probably to protect themselves)
I was browsing old TERB threads couple days ago and peoples put lots of details in reviews. Even there more recent reviews seem tamer (altough i obviously don't read everything over there since im not in there region)
Anyway maybe its just an impression, maybe its just a natural evolution... i dunno... or maybe its C-36