I think $100 may be low these days.
At a neighborhood party around 2017 I asked people what they were paying for their cable service, because I was thinking about switching from satellite. Not one was under $125, and most were in the $175 area. $250 with internet. The big sports fans were well over $300/month.
One guy who considers himself a "professional sports gambler" (when he's not repairing air conditioners 9 to 5) said he was paying over $600/month to feed the wall of six 60-inch TVs in his man cave.
"Hunnert bucks a screen!" he crowed proudly. I ended up keeping my existing service, which I think was in the $35/month range.