I’m disappointed how after downloading and pay for my app I can’t use or
MediaWiki has no applications that people have to pay for. You seem to
be in the wrong place here, whatever "app" you're referring to.
https://en.wikipedia.org/wiki/MediaWiki explains what MediaWiki is.
(For future reference, please do not reply to random digests but start
a new email thread and remove unrelated quoted lines. Thanks!)