Not sure what you mean. To become a Pioneer, sign up (pioneer.app), rise up the leaderboard by making progress on your startup, and make the top 50 to be eligible to be selected. Not really a pitch-your-startup process to it.
This is for things that can be done in a few weeks. That feels like something that made more sense in the early days of the web or the early days of phone apps. Those fields are very crowded now.