Earlier quoted context omitted.
My experience is that it's easier than you might expect if you're doing things right (you have an interesting product and low-friction signup process). I recently started a university-specific dating app and had no trouble getting the first few hundred users, even with the actual matching functionality turned off.
Free users for a dating is no problem, monetizing them is another ball game.
Interview from someone who had a problem with the way dating apps monetize, created a competing dating app with all features free, and then shut down because he couldn't monetize.