Once your profile is approved b the Collabray team, brands will be able to contact you via the inbuilt Collabary messenger system, and you’ll receive an email to let you know you’ve been picked for an upcoming campaign.
Brands can approach you in two ways. Either they send you an offer, or they send you a request for a quote. If they ask for a quote, you can then come up with a proposal or pricing (or both) that will convince them to work with you. In both cases, it’s up to you whether you choose to move forward with an offer, renegotiate or decline it.