Are any sites you'd expect to be on paid-for Cloudflare also blocked?
I put https://www.gbif.org/ behind Cloudflare on the business plan, and so far (it's been roughly a year) we've only had a couple of reports of blocking, and both seemed likely to be caused by other users on the same IP scraping the site.
I put https://www.gbif.org/ behind Cloudflare on the business plan, and so far (it's been roughly a year) we've only had a couple of reports of blocking, and both seemed likely to be caused by other users on the same IP scraping the site.