It depends if this attack is on basecamp.com or the IPs that basecamp.com resolves to.
It appears Basecamp only has a /23, so even if they redirected traffic through Cloudflare, the attacker could still find their direct servers fairly easily and attack that IP. It's still possible to block, but not quite as easy as setting up Cloudflare.
It appears Basecamp only has a /23, so even if they redirected traffic through Cloudflare, the attacker could still find their direct servers fairly easily and attack that IP. It's still possible to block, but not quite as easy as setting up Cloudflare.