As a former Interakt Beta Tester and as a user of Both Interakt Products and Adobe's, both companies were providing 1 year support and you had an option of aquiring a service anual fee support for faster support ticket answer and for upgrades.
As for upgrades even when Interakt got aquired by Adobe, everyone who had purchased their MXKollection 3 suite 6 months ago or had been long time user and were upgrading from its collection (When paying of an upgrade you were paying for all the MXKillection and not for the individual products 1by1) got an email for free upgrade to (Adobe Developer Toolbox).
Of course everybody involved in the inner products of interakt new that eventually Adobe would kill ADT for marketing purposes and to use/ingegrate its code into DWCS4.