CloudFlare and Google Project Shield.
These are the two only services that provide affordable DDoS protection, even for 100++Gbps, for $200/month or free.
Tell me another provider like CloudFlare that will protect a blog against a 100Gbps DDoS for $200 a month.
---
By the way, regulating CloudFlare by limiting its ability to choose customers would be unconstitutional under the 1st amendment, would it not? There are a very specific number of protected classes that private individuals or companies can't discriminate against.
"Do not discriminate against hate speech" is not a class.