Ask HN: Why Does Supabase Charge $75/Mo for SMS OTP Authentication?

I've been trying to find an answer to this for a while now. I pay for the Pro plan of Supabase and am confused around their thought process for gating SMS OTP for passwordless login around a $75/mo charge when you are also providing the Twilio credentials. It's essentially using an Edge function to call Twilio and ensure it's the correct OTP before allowing sign-in..