points and reward plugin queries

Reward point plugin

1. Is it possible to set condition on redemption eg – only 10% amount of the order total can be redeem in an order though reward points
2. When the order is completed customer get reward ponts but does it get deducted when customer return the product and amount is refunded
3. Right now it is using woocommerce current registration form but i am currently using wp frontend registration form so on plugin can we replace current registration form with wp front end registration form so that a person can get reward point on registration and the person referred can also earn the reward point