Is your list "customers of cloudflare" or "customers of cloudflare that could have sensitive data cached by search engines"
For example, Digital Ocean uses cloudflare, but the domain with sensitive data (cloud.digitalocean.com) is entirely blocked from Search Engines https://cloud.digitalocean.com/robots.txt
We, FastMail, are not affected by this. We do not proxy TLS connections via any third party. We use CloudFlare for DNS distribution only, which is not part of this issue.
Thanks for posting here, I was explicitly looking to see if anyone mentioned Fastmail after I saw it on that Github list. You might want to post something on your site if you haven't already, kinda like 1password did.
OKCupid
Uber
people claiming 1Password, can't find
Reddit
Lyft
Yelp
Pingdom
Digital Ocean
Montecito Bank and Trust