As per our public pricing https://clickdeploy.io/pricing.html, a free license is entitled to 10 deployment or validation attempts per month.
Our team is working on exposing these usage metrics on the UI for the upcoming releases. Hopefully, this will allow our free users to track usage easily and transparently.
Please also note that a Copado Essentials free license is intended for one single individual. If you work for a consulting firm, you should sign in essentials.copado.com using your own organization's Salesforce account, not your client's organization.
Attempts to work around our free license limit by signing in and switching between different login accounts are considered against Copado Essentials' terms of service.
To avoid duplicate accounts in the system, Copado Essentials will automatically block 1 account if it found 2 accounts with the same email address.
Hope this provides some more details regarding our free licenses. If you have further questions, please don't hesitate to let us know.