Yes, platforms that accept players from Germany will still allow promotions, including bonus spins, cash match deals, tournaments, and more. If you play in a lobby authorized specifically for Germany, there is no need to check the availability of promotions with the help desk representatives. If, however, you register in an international lobby where Germany is allowed among other countries, it is a good idea to touch base with the help desk representatives. Sometimes, platforms may limit bonuses for certain countries.