Add-on Is there a 'Demotion from User Group' add - on available

[*Nate*]

Hi,

The way we are wanting to use one of our sites is to demote users from a set User Group (that offers discounts etc) if they don't post X Posts for Y time ?

Is there an add - on available (or a setting I haven't seen) that does this, as we already run the 'promotion' but would be nice if there was also the 'demotion' which does this automatically.

Thanks

Nate.