4) If you know your content is going to be viewed online (which is the case with pretty much all Google Ads), you can remove the local copy of jQuery (assets/js/jquery.min.js) and re-zip your package. The jQuery file is about 94kb uncompressed. The reason this won't harm anything is because in5 uses an online link to jQuery (cached on most people's browsers) and the local copy is only there as a fallback for offline use.*
* Version 3.5 (or higher) of in5 now automatically omits the local copy of jQuery when exporting to the Google Ad output format, so no need to do step #4 manually.