EDIT after OP's edit.
Sad. This situation feels kind of a disaster-relief thing; not a good time to think about monetizing it. Still, I do understand you don't want people thinking you'll always be protecting them from everything even if they don't pay.
EDIT2 after clarification downthread, previous edit is to be disregarded.
(Note: I removed sentence about CloudFlare pricing from previous comment to avoid any confusion about monetization)
Thank you for clarification!
If this is a disaster-relief thing-y, CloudFlare should then be eligible to receive government money later. I doubt that would be even considered by any parties.