YC invitation emails a marketing stunt? I will not promote

I've been seeing more and more different varieties of yc emails. You're in top 5 pc You're the type of founders we fund You're the one!! I received one too.. I had signed up for reminder long long time ago.. but the reminder was sent two days after the deadline inviting to apply by 19th Feb! They first created four batches instead of two.. thinking that that would lower their acceptance rate by half.. that every one will apply four times a year Is there anything more to it than just inflating the denominator? Are they just playing with founders time and energy?