There are four reasons why the MemberMouse plugin on your site will deactivate:
1. If there is no URL assigned to your license or the URL is incorrect.
MemberMouse needs to know what URL it is being installed on so you'll need to register your URL prior to activating. If you have registered a URL, it's important that the URL you enter matches the URL of your WordPress site exactly. The best way to ensure that you're entering in the URL correctly is to log into your WordPress site, go to the General Settings page and copy the WordPress Address (URL).
2. If you manually deactivate it.
Deactivating the plugin does not cancel your account. In order to cancel your account/license, you need to log in to your account on membermouse.com and cancel from the My Account page. For step-by-step instructions please review, How Do I Cancel My MemberMouse Account
3. If your MemberMouse account has been canceled.
When you cancel MemberMouse the account goes into 'Pending Cancellation' status until the close of the current billing cycle. When the billing cycle closes, your MemberMouse account will be canceled and the plugin will be deactivated on your site. Prior to your account being canceled, recurring billing will run as usual for your customers. You can manually deactivate the MemberMouse plugin at any time to keep subscription billing from happening for those subscriptions that MemberMouse is managing (if any). Once your MemberMouse account has been canceled, billing will no longer occur on subscriptions managed by MemberMouse.
IMPORTANT: MemberMouse only manages subscriptions when payments are made through Stripe, Braintree and Authorize.net CIM. MemberMouse does not do this for all other providers including PayPal, Authorize.net, ClickBank, Coinbase and Lime Light CRM. If you have members with active subscriptions through any of those providers, you will have to cancel any active subscriptions with those providers.
4. If the plugin is unable to communicate with the licensing server for an extended time.
Every four days, the plugin on your site initiates a check-in with the MemberMouse licensing server to authorize the license, download any updates and confirm that network communication is working. If there is an error in transmission, this is logged. If this communication failure continues to occur each check-in over a month's time, an alert email is sent to the site admin to inform them of the connection difficulties and potential deactivation. Deactivation is a last resort, and occurs roughly a week after that if the problem is not resolved, after several more emailed warnings.