1. Credits are re-filled into accounts on day 1 of billing. (se pot transfera de la o luna la alta)
2. We can allow a negative balance of up to 50% of plan credit (i.e. 50 credits if plan is 100)
3. Photos = 1 credit, Videos =3 credits (tbd)
4. Marketplace stories = x credits (saved as story property)
5. tbd - buying credits in bulk