I work for a competitor to sendwithus, and, while I can't speak to specifics or the industry as a whole, I can definitely say that it is proven possible to run

I work for a competitor to sendwithus, and, while I can't speak to specifics or the industry as a whole, I can definitely say that it is proven possible to run a company whose revenue model is to charge something comparable to sendwithus's previous monthly subscription fees, be profitable, grow steadily, and not make a single dime on the side selling data to advertisers.