On the first page, there's the claim:

  Encrypted Calls
  
  All calls are encrypted with TLS 1.2+ for signaling and SRTP with AES-128 for audio. Your conversations stay private during transmission.

I would consider re-phrasing this so that limitation is more clear, for people who may misinterpret that encryption claim, unless you've found a way to encrypt PSTN signalling and audio which would be a much more impressive feat.

Could you display the rate in local currencies or at least show the actual currency in ISO ?

I'm guessing that the price in $ is USD but as we also have $ in Canada, it can be misleading, especially when 1USD~=1.35CAD

Extraordinary! Congratulations. I’ve always been fascinated by the world of telephony. How did you manage to get numbers for every country? Do you have direct access to SS7, are you a virtual operator, or do you use third-party services for each country?

Do scammers still try to get "local-seeming" numbers? Any mechanisms to prevent them registering, using stolen credit card numbers?

Are these voip numbers or real phone numbers? Can they be used to receive 2FA codes?

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