I’ve seen it talked about a few times but here’s an instance of it from early on (sorry for the reddit link): https://old.reddit.com/r/FluxerApp/comments/1r8724q/heads_up_fluxer_has_a_big_red_flag_it_requires/

Essentially, he had plans to possibly offer commercial versions of Fluxer, but plans changed after it took off in popularity 4 months ago.

The creator has stated once the refactor goes live and pull requests are repoend, the CLA will be removed. Time will tell if they stick to their word.