As someone who has tried to set up a number of people, I don’t think this is a good idea. It is hard enough to get people to even go out on a first date (and to try a 2nd date, if possible). If they had to pay per date, I believe people would be less likely to actually agree to a date.
If you look at the statistics on the 10kbatayyisroel site right now:
34,235 SHIDDUCH SUGGESTIONS
3,820 FIRST DATES — 11.1% of shidduch suggestions led to a first date — that means of every 100 suggestions, almost 90 don’t even get to a first date
331 ENGAGEMENTS — 8.6% of first dates led to an engagement, 0.97% of shidduch suggestions (less than 1%)