You can limit it to social network. I class peertube, pixelfed as a media plateform rather a social one.

For migration, can i migrate my account with :
- My followers and giving them my new adress ? Do it update itself or do we have to do it ?
- my contents : communities, bookmark, posts, comments...
- can i delete my account ? Can i delete all my content ? and how easy it is ? There we will see Meta doing an amazing score.
- bonus : can i export settings as colors scheme ? (Accessibility for visually impaired)

And let's add accessibility. :)
We don't talk much about it and we are doing a very bad job. So the scoring system should alrso raise this issue : how accessible is the decentrulized software.