@dartman Thanks a lot. You can check out my blog
https://www.expatfinance.us/, where I also list some referral links.
However, in case of IBKR I'm not sure if they work for European customers anymore. In general, they are running
an attractive promotion, namely the referred person gets 1% of their deposits in IBKR stock (valued up to 1000 USD). A friend of mine signed up last December and he got the promotional bonus, but it didn't work for another collogue.
Please feel free to try it out, but I can't guarantee that it works for EU customers. Either way, thanks a lot for thinking of me!