I get constantly annoyed by the test apple advert on my phone’s springboard after I’ve quit an app. But I think I worked out how to stop it:
And then touch the blue arrow on the right of the AdSheet.app.
Here you will be able to click into the “Name” field and rename it to something memorable (incase you need to roll back this change) – I renamed to “RenamedAdSheet.app”, then press Done.
So far, I’ve not seen any on my SpringBoard…