What would you do to promote masterminds service for SaaS founders?

Been in a mastermind group for a few years now. Can't tell how much valuable that was for my growth.

So I want to offer this as a service to other founders, it takes so much time to find other saas founders at our level now that a service would have been very welcomed.

Any idea how to promote this? My network is already on this, looking to grow it.

https://www.spincontact.io/