About a month ago I checked how many recent CPAN uploads had license information in the META files and how many had links to public version control systems holding the source of those modules.
Today I checked it again.
The numbers are quite similar.
Total checked : 1000
License found: 83.4%, missing 16.6%
Repos found: 49.7%, missing: 50.3%
I wonder if there was no impact because many people did not read these post, or they don't think this is important? I even posted it on the module-authors mailing list.
Maybe if someone else also mentioned this?
In any case, if you'd like to check your modules you can use the example I showed how to fetch META data from Meta CPAN, that is also distributed in MetaCPAN::Clients.
If you'd like to update them, here are two articles showing how to link to your version control system and how to add the license field to the META files.
Published on 2013-02-06 by Gabor Szabo