Resell my shipping rates - Login ship station portal for my clients - ADD ONS?

Can I suggest to resell my shipping rates?
For example my Fedex account: Client can use it with a mark up rate that I set in percentage + $ value.

My clients will have their own login as a normal ship station client and can have a choice to select shipping provider by lowest cost/shipstation/my account.

User/Me: Resell my shipping rates / helps keep rate low for me.
Shipstation: Attract business for both parties if shipstation provides a better rate or through my shipping provider?
Client benefits: Save on shipping rates and get the best rates from my account or shipstation itself. 

Let me know if this is something we can do. I think I can help attract ALOT of clients that ship thousands daily into shipstation. We currently have a solution but would like to integrate everything with shipstation as we are pro shipstation. 😉 

Thanks,
Kenny