50 or 100GB isn't really a whole lot.
I couldn't live with those limits.
OUr 2 person household usually generates/consumes 600GB-1TB traffic / month. IPTV, Games, Downloads, Uploads.
Streaming Netflix is a blip on the radar and effectively consumes not that much, as witnessed while I was on vacation for two weeks and binge-watched on the train (three times 7 hours didn't even cross the 5GB mark).