I didn't think you meant that literally, but after paging through a few tens of google image search results for "krita samples", it seems the only thing Krita is actually used by people for is fantasy art.

Compare to "corel painter samples" where the 2nd thumbnail is a fairly impressive Audrey Hepburn rendition

Can't remember the last time I saw output of the style from the first search result being used to sell pretty much anything