You'll still be able to buy the uncensored version in stores, but you aren't allowed to advertise the game unless theres a rated version of it.
The international version won't get rated, so advertising isn't allowed but it still can be sold as long as the buyer is 18+. The rating only matters if your under 18. Since there is a rated censored version they can advertise again.
In case any non german reader wonder how it works here.
A good example was one of the new C&C games, the original version was denied a rating, so they released a censored version and an uncensored unrated "Kane Edition", both are sold openly in stores and 18+