PS2のサイトのショップページのメンバーシップの注意書きに書いてある。
****The amount you earn resets completely if you cease membership
for over a month.
If you discontinue your Premium Membership, you will lose membership
benefits at the end of your then-current billing cycle unless, within 30 days
of ending your membership, you purchase a new membership. If you purchase
a new membership more than 30 days after ending your current membership,
you will return as a member at the lowest applicable percentage tier.