Right now there’s 12297 titles on Instant. (I wonder if the 20,000 comes from individual TV episodes) You’re not going to see every single title if you’re just browsing through. But you can find them through search and the different recommendations that pop up.
This site is awesome, thank you! But not having thousands of the movies they carry come up on browsing? That’s really dumb considering how many people will be scared off from their “small selection” of movies when considering buying a membership.
Actually, it looks like you can just browse through all the movies. I’ve never done so before because it seems like a really awkward way to do so. For example, here’s all the “Action and Adventure” movies: