Is it permissible to work in affiliate marketing for various companies' products via Jumia, with a refundable security deposit?

If registration on the site is free, and the amount paid is not a fee but a refundable deposit upon request, then it is permissible to take a commission for marketing permissible products on the site. It must be noted that this amount is considered a trust (amanah) with the site, and it is not permissible for the site to dispose of it or benefit from it; otherwise, it would fall under the ruling of a loan.