Nice tool! I had no idea that my notes were being seen on so few relays. I wonder why my posts aren't being seen on my paid relays? Nostr wine seems to be my only paid relay that is working of the 5 that I have added. 
NOSTRGRAM TECHIE UPDATE - NOTE RELAY LIST
For those like me who love the technical details, you can see the JSON structure of any note plus the list of relays it was seen at by clicking the ellipsis in the note actions list and then clicking Note Info.
However, if you want the list of relays to be shown beneath the notes in the feeds, there's a new option in Settings (⚙️) that's off by default: "Show relay list beneath note actions"
It's near the bottom of settings. Enable it and you'll see the list of relays beneath the notes (with paid relays prefixed by a 💲).
Try it out at https://nostrgram.co/
Already in NostrGram? Refresh the page to get the update.
Discussion
I'm not sure. I'm seeing the paid relays on a lot of notes, so they're working (at least in some clients). Maybe contact the relay operators and see if there's an issue?