The Circle levels are based on donations - Junior ($12) / Silver ($120) / Gold ($300) / Diamond ($600) / Platinum ($1,200). As soon as you have donated the amount linked to a level your level of membership will be upgraded.
The Scarf Circle recognizes your for the time you invest helping us to get our community of donors active growing giving you BP-Coins every time you take an action.
Ones you collected enough BP-Coins to level up your membership they will be automatically deducted from your account in
exchanged for a free level upgrade that recognizes you for a higher level of support given to World Scouting through The Scarf Circle. You will keep the remaining BP-Coins.