An in market plan would be any plan available for you to sign up for in your area, (subject to the normal eligibility requirements such as being a new customer or buying a phone on the tab). It definitely includes the promotional plans if you're eligible for them.

Thank you for the reply so does this also apply for the starter plans as well? even with the promotional plans currently on the website I rather keep my plan with freedom which is a lot better

also the discount does it discount the taxes as well?

From my understanding it does include starter plans