> Either for free or for a price.
Also, there's stuff from KDE in the marketplace too:
https://marketplace.qt.io/collections/plugins
It seems like they don't host the binaries for free projects, but instead you provide a markdown file with installation instructions, like this:
https://marketplace.qt.io/pages/karchiveinstructionspage
And when a user clicks "Get Extension", they are sent to this page.
More information:
https://wiki.qt.io/Qt_Marketplace_Publisher_Guidelines