I highly disagree, google 10 year ago had nsfw content, it had a great long tail. I signed up and found it to have little depth and it skips most of the web. It does a great job of filtering out spam but it equally good at filtering out everything else. Tech related it's great. For shopping not so great. For local not so great. For science, education it's pretty decent. For anything like torrents or coupon sites or sites in other languages it's not the best.
People say this, but it's rarely true. Anybody running a subscription service quickly learns that it's not worth bothering with customers who won't pay at least $5 per month. They're the most trouble for the least income.