Multi-stakeholder Co-ops in Worker.coop

Solidarity Economy Association are a multi-stakeholder co-op, but have always been worker led, so we have always felt at home in Solidfund and at Worker Co-op Events. Last year we launched a new multi-stakeholder co-op, called the Digital Commons Co-operative (whose crowdfunder we are shamelessly promoting here https://www.crowdfunder.co.uk/p/digital-commons-cooperative-launch) but when we open up its membership next year, the intention is for it to have a wider range of stakeholders at the governance table. What are people's thoughts on how strong the level of worker ownership and control needs to be to join worker.coop, solicit solidfund etc?