I see a difference in the status of the master admin - is it a pro or free acccount?
In case of "free" the MA is in reality a member of the wikidot "free account" community and not a "private" one like a "pro".
This makes the basis of work different - the pro has bought his rights and no body else can decide what is to do with his sites and pages at the last end,.
On free accounts this looks at the first stage for me different - someone starts a community on the free area of sites and
- find some contributors for his work - this builds a "group" ( there lies the issue of this blog ! )
- or let the site closed but public - than he is alone and nobody can ask for transfer of perhaps very good pages and articles.
If there are other admins and the site is more or less open for others - than I would suggest to create very often BACKUP's and save it ( with download by the other admins) - than the question is not so hard what to do…