Because they didn't touch anything else, or had the foresight to restore before applying the update.
People who simply root and do nothing else are a) few and far between, and b) probably able to use the patch.
Also, many of those that got the FULL OS Update had previous been rooted or installed the leaked chinese version.
Only if your tablet was pretty much pristine will the patch work. Open the patch apk (rename it to zip) and look
at the things they fix. They check a lot (to be sure the patch won't apply to the wrong version), but only fix 4 or 5 small files.
People who simply root and do nothing else are a) few and far between, and b) probably able to use the patch.
Also, many of those that got the FULL OS Update had previous been rooted or installed the leaked chinese version.
Only if your tablet was pretty much pristine will the patch work. Open the patch apk (rename it to zip) and look
at the things they fix. They check a lot (to be sure the patch won't apply to the wrong version), but only fix 4 or 5 small files.