Mattias T 
I'm actually glad that #microsoft seems to have set a minimum license count to 300 for #copilot .
Makes it easier for an #msp to handle this. At least in the beginning.
My guess it that the minimum license count will decrees over time when Microsoft has managed to offset their initial development cost.
This link should work with your partner accounts. https://aka.ms/M365CopilotGAPartnerFAQ
Can be found at the bottom of this page: https://cloudpartners.transform.microsoft.com/practices/modern-work/copilot