You have to make authentication post to create free blockchain account.

Authentication post

I want to link my Steem account with my account on Snax blockchain using https://snax.one
Please, create Snax account for me!
My authentication hash: 2a0ea17fceac7b03d739ad5bfddf26d2a9cffd15e0a43c665d8ebaf36830f4cb

Add this tag to your post

free-snaxaccount

DO NOT MODIFY POST TEXT
for success registration.

DO NOT DELETE YOUR AUTHENTICATION POST
Your blockchain account can be deactivated in this case.