Pausing and cancelling are equivalent on Run.

Click the Cancel Subscription link in Payments and Domain section of the Site Settings page.

Cancelling your Run website does not delete any of your data and your subscription can be resumed at a later date.

If you resume a cancelled subscription on Run within 1 year, you will not have to pay a startup fee. If your pause is greater than 1 year, you will be required to pay a new startup fee, equivalent to a brand new subscription. A cancelled site is only eligible for restarting without a startup charge if it's being used for the same campaign or candidate as the original. A Run site can not be passed on to a new campaign in order to circumvent the startup fee.