I wasn't sure if this was the right place to post this so apologies if it isn't.
A post on my blog recently got picked up on social media and got some great traffic (about 41K unique hits). I now have a pretty consistent readership and wanted to switch to a self-hosted wordpress.org site from my free wordpress.com hosted site. My only concern is that if I switch from my current wordpress.com site, my Alexa score (which has skyrocketed recently) will go back to having no ranking data.
From what I gather, Alexa measures traffic to a particular domain and since all the traffic I've picked up has been to a .com domain I purchased though WordPress, it shouldn't be affected. But I wanted to play it safe and be sure.