I have a follow-up question. Can you reverse them? Clearly, you don't need to do both, but what if you want to switch?
I have my own domain and purchased the mapping when I was hosted on wp.com. Now that I'm not hosting there, I want a redirect instead. When I try to buy the upgrade, it tells me I can't because I purchased the domain mapping on the same account. The domain mapping, however, is expired. I don't want people to type in my domain and get the old blog ...
What do you suggest?
I'm also considering just deleting the blog since translated traffic is so low. Everyone goes direct to my domain now, so why pay $13 annually to just keep the old site?