I am an FBA seller in Europe but I am also on Merch by Amazon in the US.
Can I link my accounts to run Advertising / Sponsored Products and campaigns through my Europe Seller account or is this completely separate?
If so to is it better to set up a Seller North America account to advertise through or through Amazon Marketing Services? Your advice would be appreciated.
No you can’t link your European FBA account and your Merch account - they are entirely separate.
As for the best advertising method I would suggest getting some advice from other Merch sellers about what works best.