XF 1.4 User "Account Upgrades" for free?

[Tim]

How can I do this????

On VB, I allowed members to Opt In to a specific user group so they could see additional content... I made it an action the user had to take to see the content.

In xF, I don't see how to do this. It appears that selecting to join a user group is not an option (that I can find), and Upgrading requires a value larger then zero, I don't want to charge for the upgrade.

Am I missing something easy? Is there an alternative way to allow a user to opt in to an user group?

TIA

 

[Paul B]

You can do it with a custom user field and user group promotion.

 

[Tim]

Thank you, that worked... not as easy as making any Account Upgrades free, but it worked. Now to explain things to the membership.

 

[VanValdenburg]

Why cant this be added? It is a huge difference having free subs with payed once on a single page.
I mean i do not know if its possible but it seems easy to us users to add this to xenforo.