@digipl you are on fire today! Great links and something I will need to study a bit farther.
It the account creation attack thread I do agree with you that an account should not incur a cost to set up, just like browsing the SAFE Network should be free.
Disregarding the technical implementation and account creation attack of this, would it be feasible to have free account creation, but pay for any persona creation? Think of it like visiting a forum. Anyone can view the posts, but to post yourself, you must sign up for a persona on that forum and then under that persona you can post whatever you wish? (the single forum in this analogy is the entire SAFE Network)
In that scenario, personas can indeed have a similar implementation to DNS and just be another SD type.