the Free version you get most of the anime on there, The anime and episodes with Crowns
are stuff Free users can't watch unless they have a code thingy from a premium member for 2 day Premium access.
It's rare for a whole anime to be premium only but there are a few. Like Bleach is premium only. Ah, i think the uncensored version of "My wife is student counsel president" is premium only, prolly get keep kids from watching the naughty bits o3o
The episodes that are premium only are just the recently aired ones, after a week free users can watch them.
So unless they have crowns, you can watch as much as you want, no limits
They been changing things around so some of these info might be inaccurate. >x<