Is it not time for you to give up on USD and Kraken? It simply won't happen in a straightforward manner. Go to Gemini.

There's no way I'll be going anywhere near this service either. It smells like a cop out from Kraken and etana themselves smell like the type of place that's going to disappear with little to no warning.

If I were running Kraken i would not be exposing my customers to a place that appears that shoddy. I would wait for real and integrated banking for other currencies or forget everything other than EUR.