Originally Posted by astra
I think I read it.
People don't buy extension. Most people have no idea what "file extension" mean and have by default "hide known file extension". People buy ebooks by format. PDF, MS Lit, ePub, Mobipocket....
Of course they do. But the reader software uses the extension to determine if it can be read. People actually have to be forced to deal with formats and they can be forced to deal with extensions if it solves the problem. (Much of the time the extension and the format are the same.) They really just want to buy by the title and have it work.