The whole business of copyright is a morass - and it differs from country to country, to add to the mess. I think many laws need to be reconsidered in the light of the digital age, and consider what constitutes “fair use”, but creators/musicians/whoever do need to have their work protected, too. A difficult task, to be sure.
Wouldn’t it be nice if that were true? (It would make parenting so much easier, too! 
) This is why I think in the end Aran might need to talk to the people that run Memrise, because they are the ones that have control over what is published on their site. As far as practicality, it could be as simple as someone volunteering to check Memrise every so often and letting Aran know if they see a Memrise course that uses SSi material.
Regarding the speaking/reading/writing thing again - I certainly didn’t mean to send this thread off topic. I think there are large differences in learning Welsh for someone from Wales, and someone like me, brand new to Welsh and living elsewhere. We may not always realize the different perspectives and experiences of someone learning under different conditions than our own. After reading @Y_Ddraig_Las’s post, I thought that was an interesting thing to think about, and I shared my own perspective/experience. For me, the SSiW way was the right way. I personally am glad to have had the benefit of Aran’s philosophy. I was not and am not trying to say that it is the only way, or should apply to everyone else. I should probably not have posted my thoughts in this particular thread. @aran, I apologize for having gone beyond your original request.