Typically when they remove something from the App Store, people who already downloaded or bought it can still download it again. In the past, even things that were blatantly against the TOS for the App Store were simply removed from sale, including emulators, proxy/tethering apps, etc.
So if Apple really leaves Dash off of the Purchases tab (I can't find it here), it would be the first time I'm aware they've done this.
Hopefully they'll work things out soon one way or another.
Being removed for fraudulent activity is one of the times where it makes sense for Apple to remove the download completely from the store, because you don't want the fraudulent activity to continue. Obviously it was a mistake in this case though. But I bet Apple's done this before, just not with any app that people actually gave a shit about.
So if Apple really leaves Dash off of the Purchases tab (I can't find it here), it would be the first time I'm aware they've done this.
Hopefully they'll work things out soon one way or another.