Other than the Caddy debacle, there was a short-lived attempt to run ads in the output of npm install, which also backfired spectacularly: https://news.ycombinator.com/item?id=20786981.

I think if there was a magic button to remove any and all advertising from the internet, most people would press it, consequences be damned. You really need to think hard before hitching your cart to that horse.