the original key from booster.io which is a must have WooCommerce optimizer plugin if your online store build with WordPress and WooCommerce.
there is no technical support, since so low price. you can seek help from https://booster.io forum.
Demo URL: https://booster.server2.trinchera.dev/
Demo Admin: https://booster.server2.trinchera.dev/wp-admin
You will get one Genuine key and the installment docs