Why not timebomb the minified code and reupload updates to the marketplace plus a grace period for late updaters? Ok, they could automate that, too. You'd need

Why not timebomb the minified code and reupload updates to the marketplace plus a grace period for late updaters? Ok, they could automate that, too. You'd need to checksum something from within. Where the problem arises: how to know the checksum before the code was fully minified. I think there are companies, that specialized on tamper-proofing js-code with a lot of crazy tech, i lost some bookmarks for this and couldn't find it right now.