Given Sony's recent string of questionable business decisions and showing their own customers what a bunch of shady pricks they are, they're probably desperate for any amount of cash injection to put on their quarterly report.
Edit: fixed typos from when I stupidly typed while barely conscious.
I would add creation within an IP to this as well. There are so many good IP out there that some large company has devoured and actively chooses to just sit on when we could be getting good fan-made content. One example that comes to mind since it was brought up is EA sitting on American McGee's Alice. So many fans are desperate for good content from their favourite IPs and are getting corporate by-the-numbers drivel at best or simply nothing.
I think a good trade off here is fans can make what they want then the owners are allowed to incorporate fan stories at their choosing so X fan game would be the official third game in a franchise then the IP owner could run with those ideas to make the fourth entry, for example. It'll never happen but one can dream.