Informant Data for classic vs retail
Have noticed some recipes and such are reported incorrectly, being listed as unavailable from vendors, even though they are available in Classic. Have selected the option to update INF when visiting vendors, but the option is off by default, so many folks are likely not getting correct information, even after 'seeing' a recipe at a vendor.
Not sure what, all, is different, but the most recent data is from 2011, anyway, so even retail is likely missing some things.
Hirsute used to periodically update INF from WoWHead's database. Forget the point of contact, but they would actually run the query and provide a data dump which could then be used in INF. It was in the old SVN repo, somewhere. Could be scraped, but it worked well that way, then.