A few members have reached out to question how I came up with my observations.
In the SNDB, a RAW QUERY is now available.
-Under "High/Low Lists" the last option is "Raw Query"
-Scroll down the prefixes available until you find the prefix you'd like to investigate (in my case, FTH) (2nd & 3rd images)
-Then hit "Go"
-You will get a read out chart of the various members who submitted the prefix in question (3rd image).
Hope that helps any of you who may be curious as to what's tough (& what's not)!
There is a warning which is intended to discourage common prefix enquiries b/c the list could be VERY LONG!