I created a similar MVP about 4 years ago and dropped the project in favor of another. Since that time I've decided to take another stab at it, this time focusing more on how the API can be used for marketing research.
Edit: guess the charts and other little tools can make it useful
I'd also hoped to add additional value with charts, built in A/B Bayesian calculator, and webhooks/callbacks when a count reaches a certain value (yet to be implemented).
But I see your point, and I certainly worry about the market size here.