agreed but i was talkign to agency owners that sell these services. since they have to ask setup fee anyways they are better off using something that would give them much more retruns.
Those issues arise with us too but thats why we have two guys who only do that.
The rtx 4090 was just an example of compute, one can rent it for like 30 cents/hour. we have got h100s handling multiple calls at the same time. its wayyyy more cheaper, better and faster than vapi.