You can. Finland forces operators to stop routing non-verified and spoofed numbers. Spam gone.

https://www.tieto.com/en/cases/telecom/global-anti-fraud-mod...

From your link: "The scam-blocking service is based on modern cloud technology, and it’s scalable, and easy to deploy" - I don't think we need another SaaS parasite for this as protocol-level solution like STIR/SHAKEN is a better approach IMO. The problem is that operators are not incentivized to do anything with spam/scam.

As finn. I can verify scam calls are non-existent lately few do occasinally popup, but its like 2000 times better than before. When i learned about this originally, i was shocked like how this is not default?