I don't have it nor am I a boxing fan, but my understanding is that they only show the fights of the guys they have signed. They have a bunch of big names like Joshua, Canelo, and GGG, but guys like Pac, Wilder, Fury, etc. are with Showtime, ESPN, etc. So some of those fights that should happen, might not or at the very least will be harder to put together with 2 promoters.
Bellator has some good fighters, but they are way behind the UFC IMO. Like Bader is their LHW and HW champ, but he was a Tier 2 LHW in the UFC. I like what they are doing with the tournaments, but the talent just isn't there. At the top end or depth. A lot of their big names are washed up/should be retired former UFC stars. So if you want to see those type of fights plus the occasional good fight, then it might be worth it.
I think/hope the UFC eventually goes this route, though. $20/month for ESPN+ and you get all of the cards, including the PPV. $5/month for ESPN+ plus the $60 for every PPV is just too much. It's either pricing people out or forcing them to stream it illegally IMO.