@just1witness Yes, in layman's terms, that's a cookie, or a tracking cookie. That's what they're for. That's why ad services know what you browse and show you stuff relevant to that, or how Facebook tailors what they show you based on what they think you'll like. The information that browsers can access about a system is relatively limited - hardware basics, what browser that your browser claims that it is (this is really easy to change what is sent), what size your screen is. If I had to guess, any data they're collecting is likely going toward marketing (where are people coming here from?) and improving their process. I've noted they also seem to internally catch errors and collect that info for the dev team, as well, which is not a bad thing, and is likely the primary reason hardware/browser info is collected - for debugging purposes.
However, you're 100% current about non-commercial use only. However, it is also in beta and this is something that will likely change in the future (for a fee, of course).
@Oliin I think Amper was designed with the idea of creating and linking together short segments of the generated music into a completed song, hence the repetition. However, the part of the process meant to help stitch two segments together still needs work. That said, I, too, prefer Jukedeck.