They were all SP compared to their base counterparts. But that isn't the criteria for using SP. SP is used to indicate a shorter print run for cards within a set. I do believe that the Member's Only sets were released as sets, so there shouldn't be any short printed cards. No SP should be used here in the Member's Only set.
-- Dan --
Note: Please see my profile for more info regarding trading (section updated 10/25/2023). I have added a large portion of my inventory to the site, and currently have trading turned off (details are in my profile). I have (finally) unearthed my 2 very large boxes of Star Company minor league sets and they are available (email for details).