Saturday only commuter service?

Here is a little curiosity to come out of Stagecoach's 31st August service changes in Hull. On service 16, the 0730 Paragon Interchange to Siemens 'short' was withdrawn Monday to Friday (first journey now at 0908), but retained on Saturdays. Seems rather odd that a morning peak service to Siemens is being provided on a Saturday only? There is a Monday to Friday only 0700 East Yorkshire service 79 from the Interchange that serves Siemens - is the 0730 a Saturday replacement for that? Or is the explanation something else?