> They have own Autonomous Systems with own anycast IP addresses.
> It is quite expensive for an indie project. Not to mention legal support for compliance in every country of presence. To block 0.x% of visitors coming from CloudFlare is much cheaper for a small project than to go this road.
I don't buy this. I'm running my own AS and anycast services for £10pm (my ISP are sponsoring my allocations from RIPE).
Also, it feels like Cloudflare's DNS service is more than just 0.x% of the internet....?
£10 GBP a month for a AS with an IPv4+IPv6 subnet + worldwide POPs that allow you to advertise your subnets over BGP? How did you pull that off? I've researched this a while ago and just the IPv4 subnet alone was at least 10x that amount if you are OK with leasing it from less reputable sources.
I didn't say IPv4 :p
You're right, if you've got a legacy internet requirement then that adds another grand a year to your costs. But I disagree that it's "quite expensive for an indie project", especially one that's so popular it needs to run it's own CDN.