Some widely used open-source software is distributed under restrictive licences: for instance, the R language uses GPL v.2/v.3. This and other copyleft licences impose several obligations, such as the availability of the source code, which seem to contradict Section 6.2 of Upwork's T&C:
... Freelancer agrees that it will not incorporate into Work Product or otherwise deliver to Client any software code for which the use or distribution of the code will create (or purport to create) obligations for Client to grant any rights or immunities under Client intellectual property to a third-party, including without limitation any obligation that the Work Product or Client software combined with, derived from, or distributed with such Work Product (x) be disclosed or distributed in source code form, (y) be licensed for the purpose of making derivative works, or (z) be redistributable at no charge.
Suppose a freelancer must incorporate R in a low-budget project -- say,$15 fixed -- for which the standard T&C is the only feasible option.
Questions:
- Is there a legal contradiction in such cases?
- What are the implications and remedies for Upwork and freelancers?