We’re all frontiersmen here, and learning as we go. I dont have all the answers!
Yeah the hypothesis is that spammers won’t pay thousands of sats for paid relays.
So if a relay is paid to write, you could expect significantly lower spam/noise over free to write relays.
If spam is not a problem for you, this is a good thing.
If you want to discover new content, and users you could experiment my adding relays you haven’t used, at risk of increasing your spam/noise.
Another method is to use a note discovery tool outside your client like zaplife.lol to check the most zapped notes, and users.
With time I expect many clients to implement notes by zaps, as opposed to chronological order.
Note having a big number of relays (for me more than 15) could affect your client performance, warm your phone, and/or drain your battery.