Also related: depending on where in the world you reside, you may be more likely to encounter Cloudflare blocking sites or simply slowing the retrieval of websites (as it scrutinises traffic to those sites). This may be more likely to occur to you if you access the web outside of North America and Western Europe.

CloudFlare is ruining the internet for me (2016)

https://www.slashgeek.net/2016/05/17/cloudflare-is-ruining-t...

And the ensuing Hacker News discussion a few months ago:

https://news.ycombinator.com/item?id=21169798