What are the benefits?
Discussion
The paid filter relay takes the feed of a bunch of free public relays and filters out a ton of the spam.
So you don't have to subscribe to any public relays directly.
That paired with the mutinywallet relay blasting your posts onto 300 other relays, you don't really need many other relays to reach across the Nostrverse.
How spam free are we talking? Over or under doing it?
Actually just checked their site. Less of a filter and more of pulling notes 2 steps removed from you. People you follow and people they follow.