An unlimited grant to both the company and all users of the product is absolutely insane and makes it entirely unusable from a commercial standpoint. Unfortunate, it seems interesting.
GitHub has similar terms [1], which are there to ensure that nobody can share their content through the platform and then claim that they never allowed them to copy it. Sketch.systems probably wants to provide a collaboration feature, which would need some kind of license grant.
GitHub's terms are better, though, because they clearly explain the purpose of the requirement.
They aren't similar. GitHub's terms clearly restrict their license for use within the service. Sketch.systems grants an unlimited right to use and distribute AND gives the same rights to all of their customers. That is incredibly broad.
GitHub's terms are better, though, because they clearly explain the purpose of the requirement.
[1] https://help.github.com/articles/github-terms-of-service/#4-...