The question is: is the total of these testcases (from one source) within that limit ...
[ recalling from memory of past talks with FSF legal ] By submitting a testcase to the FSF, the author extends rights to the FSF to republish the testcase, in the original form, or modified.
This is how mailing lists work for example, and why the FSF can have a web archive and send out past content that the FSF didn't write to random other people and not require an assignment for each email.
