Payments.

A fair deal is one you can check yourself.

Payouts go to you. The platform pays your account; the agency invoices you.
A statement every month showing earnings, commission and charges.
Gross or net matters. 50% of gross on a 20% platform is 62.5% of what you're paid.
Never pay to join. No sign-up, training or deposit fees.
No fines for missed hours or targets.

General information, not legal advice.