It looks like Poker for German players will be extremely limited after July 2021. Brace yourselves:
New regulation on online gambling in Germany will enter into force July 2021
If I interpret the regulation correctly, it won't be possible to play more than 4 tables even if you launched 2 different poker clients. You won't be able to deposit more than 1000 per month regardless of poker client. They will need to connect to a centralized location in order to determine how much you can deposit etc. Wouldn't really affect me but high stake rollers might be impacted. I hope PokerStrategy will summarize and make a post of the upcoming regulations.