Originally Posted by latepaul
If someone wanted to compete with Amazon by offering mobi/KF8 format files would they be able to just go ahead and do so or do they need to license the format from Amazon who could then veto specific use (i.e. stop them competing)?
Assuming the formats are "open" in the sense that one can create and sell ebooks without Amazon's permission, do publishers have to agree to mobi/KF8 format exclusivity deals when they sell through Amazon?
Smashwords books are generally available in Mobi format as well as various others, so it's certainly possible to sell Mobi files alongside other formats. I don't know whether or not Smashwords pay a licence to Amazon to use the format, though.