Create your account, then choose how to pay. One payment activates your account for good.
Step 1 · Your account
Step 2 · Payment
Tap Unlock Mimic to pay in a new tab — then come back here and tap I've completed payment.
A one-time payment activates your account so you can keep and share your Mimic. After paying it can take a few moments to confirm — if it says it hasn't seen your payment yet, wait a moment and tap again.