which license do we get when downloading skins?

[Hosenloser]

Unfortunately I have found absolutely nothing about any licenses or rights for the skins offered here.

I don't want to panic, but with the current status, anyone who uses the skins could be warned by the authors.

Hence my question: What rights do I get to the skins when I download them?
Right to use / display? Any Attribution required?
Right to modify?
Right to sell them?

Is there a way for the author to decide that?
Does the author relinquish all his rights to the works when uploading?

 

[Hosenloser]

Ok wow !

 

[Neilski]

@Bram Hengeveld should be able to give you a good answer on this one