How/where do you get more accurate data than MaxMind does? And under what license do you have access to this data, and under what license would you be able to offer it to others? If all the legal stuff looks right, and the data is indeed more accurate, then of course there's going to be interest in it. I think it would take a while for word to spread and links to propagate, but eventually you'd see quite a bit of sus…
My only experience with MaxMind was the trouble we had when we got a new IPv4 assignment from ARIN. I filled out the form on their website the first week, our address was in the WhoIS records for our IPs, and our BGP announcements made our location obvious, yet they had our IP's (obviously from ARIN) showing up as originating from South Africa for months.
Seems like anyone who can look at BGP tables and whois information can get more current and accurate data than MaxMind.