I would be surprised if the value of a note is affected by being the high or low note listed in the SNDB. That's not what it's for.
As for knowing how many people use it, look at some of the statistics on the menu at the left. That should give you some idea.
Logged
BWJM, F.O.N.A.
Life Member of CPMS, RCNA, ONA, ANA, IBNS, WCS.
President, IBNS Ontario Chapter.
Treasurer, Waterloo Coin Society.
Show Chair, Cambridge Coin Show.
Fellow of the Ontario Numismatic Association.
