What stage is the license is bound to the customer’s Genymotion account?

The license is bound when the customer clicks “Accept” or when they first order any product, whichever happens earlier. That date is the Effective Date in the agreement: Genymotion SaaS (Cloud) End User License Agreement

If you want, I can also explain the difference between the Effective Date, the License Term, and when a license is actually registered in the account.