I'm working on this concept since 2013 to enable calls to call center agents through websites & mobile apps (& other channels, even from an FB page or eBrochures).
No more expensive and limited Toll free numbers setup (TFN), no more landlines or DIDs (direct inward dialing).. all the caller needs to talk to the agents is an internet & by clicking a button on a website/app for free. and, no more long distance charges nor use of phone loads/credits..
No actual deployment yet except for an internal app for a BPO to their IT Service Desk.
I've also uploaded a test calling app for the 3 major fast food chain (KFC, McDo & Jollibee) in the country in 2020 to help people call them directly to order (calls deactivated after a year due to cost of maintenance).
I see a lot of potentials but maybe it's only me? Thanks.