Practically, I think the premium only makes sense if the routing layer gives you something operational: one contract/invoice, EU support/legal process, spend caps, audit logs, maybe provider fallback. If it's just a pass-through to the same US/China model endpoints with +5.5%, I don't see much reason for devs to switch on price or sovereignty grounds.

I haven't looked at whether Eden does this, but Openrouter provides a number of these, and more. I go direct to the major providers, and use OpenRouter for the smaller ones because it saves me a lot of hassle.

If Eden provides a similar feature set, I'd certainly consider them.