The new version (v1.2) of Instant Campaign is now out. It now supports DXA 2.0 among other things. This version has been closely developed together with a retail customer which has actively contributed with pull requests.
The Instant Campaign extension for SDL Tridion Sites make it possible for digital agencies to create HTML based campaigns and upload it as single-package with all campaign assets (HTML, CSS,JS, images etc). Instant Campaign is perfect for short-lived campaigns with unique experience (with specific layout, style, interactive elements) without the need to involve developers to create new CMS templates.
A summary of new features:
It is available as a free add-on on SDL AppStore: https://appstore.sdl.com/web-content-management/app/instant-campaign/748/ (select version 1.2.0)
It is also available as open-source on Github: https://github.com/sdl/dxa-flexible-campaign-content
Support for SDL Tridion Sites 9.0 and DXA 2.1/2.2 will come in Instant Campaign v1.3.