Today I watched more then 100 Eps of a show (5min each episode) so... yeah... 50 Eps its nothing... 
TarantinoMariachi
That is one thing.   Episodes/movies can be different lengths yet they each count a 1. 
Take downloading from Disney+ for example:  School House Rock the episodes are about 3 minutes long each.  Duck Tales are about 22 minutes long each, The Mandalorian are about an hour each.  And movies which can be over 2 hours.   But each count as 1 for the day, no matter the length. 
I finally experienced the download limit.   I had a hard drive crash recently so I went to redownload some of the shows.  Yeah it was a pain.  To get all 6 seasons of School House Rock's 51 (3 minute) episodes took two days, even though the "screen time" was not much more than some single feature movies.   But at least my queue was retained, and all I had to do was just relaunch StreamFab the next day and restart the download. And when one service (Disney+) hit the limit, I could switch to downloading from another (HBOMax). So it wasn't too bad.  
Tht being said,  If these artificial limits helps in keeping the usage of StreamFab (and similar competing products) "under the radar" and therefore prevents the streaming services from making changes for the purpose of breaking StreamFab or it's competitors, or it prevents the streaming services from cancelling user's subscriptions because of the activity,  I would say it's worth it and I can live with it. 
Imagine how upset we'd be if our streaming service dropped us, or they took steps to block StreamFab and the like, and we could no longer use them.