We want to decomission CiviCRM. One large remaining process supported by CiviCRM is managing the supporting memberships. This ticket is for migrating them to Donorbox.
The migration will happen in stages.
**1: Preparation**
* Prepare campaign page in Donorbox
* Prepare communication material to existing members
* Set up infrastructure to send emails to supporting members in Donorbox
* Design a new https://ev.kde.org/donations/ page (T4275)
**2: Opening low-key for new supporting members**
* Sort out accounting
* Deploy new https://ev.kde.org/donations/ page
**3: Migrating existing members**
* Communicate to existing members that they should switch
* Close down CiviCRM (unless there is anything else besides supporting memberships remaining on it)
**4: New membership drive**
* Run a campaign to recruit new supporting members