[AdrianEGraphene]

I see a few answers here touting the use of a fee and I couldn't help but ask for feedback on my in-production solution with a few thousand users. It uses a refundable $0.05 fee, which is refunded if a call lasts more than 25 seconds. [1]

A business model we're pursuing is to let legitimate callers pay willing recipients $/min according to the recipients predetermined rate. [2] I'd love more users/feedback/customers. iOS is in the works for Summer 2021.

[1] https://karmacall.com/

[2] https://thecompanybrief.com/briefs/rhntb