I just read this question:
If I want to create word search puzzles what approach is best?
It seems like most word search puzzles have a quantity of words that match some theme, arranged haphazardly, with some random letters filling in the extra spaces.
If I want to create and sell word search puzzles what do I need to consider in my puzzle creation?
The question seems like a good one, and on-topic, until you get to the part about selling the puzzles. I don't think that's within our scope, though I do think the question would be good if that part were edited out. What does the community think?