Relicensing and rebasing LibreOffice

Sorry for the self-reply: There's nothing in the (L|A|)GPL preventing it from being sold in app stores in general. It is only that some *insert nasty word of your choice* corporate parasites have prohibited all forms of GPL from "their" app store. The appstore with the biggest, and afaik growing, market share (Google) is perfectly fine with all forms of GPL.