Every Influencer brief names one platform. That’s the platform you’re being hired and paid for: your compensation is based on your follower count there, and you have to have authorized that account with Cohley to apply.
Can I post to more than one platform?
You can, as an Extra Post. If you want to put the same content on a second platform on top of what the brief asked for, the Extra Post option is there on every Influencer brief — you don’t need permission.
If a brand wants posts on two platforms as part of the deal, that’s a paid deliverable and should be agreed with them, and then added to Cohley as an Extra Post.