Have not seen minor league sports for iSS....Intellishop does baseball but they ask you for a deposit (and I understand there are tons of questions on the report).
Survey Scouts are good....in certain cities they do MLB, NHL, NBA, and even NFL, but not in Chicago....I did talk to someone recently who did say they are looking to get into the area at some point.
Bare does Major League Soccer.
I'm looking for an MSC that does concerts in the Chicago area. I know A Closer Look has them at one venue and Intellishop every now and again has one. Service Scouts have them outside my area like the sports.
Silver certified (since 2009) and willing to do shops all around the greater Chicago, NW Indiana, and Southern Wisconsin areas (including airports!.