Nope, no limitation for sales in any of the licenses. Only how you distribute it.
indie single / multi: digital only (online stores, forums, etc for windows, mac & linux)
mobile: same as indie but can sell mobile app versions for iOS & android platforms too.
professional: same as above but can also sell physical copies in retail stores (probably requires a publisher like Daedalic or Deep Silver to do that though).
* note: mobile & professional licenses only cover 1 title (a single game). However the indie multi license is included in those licenses so you can keep on working on as many digital only projects as you like afterwards.
