Has anyone used Vertical Response Integration with vBulletin?

I remember when this was added but haven't heard much since.
https://www.vbulletin.com/forum/entry.php/2453-vBulletin-4.1.2-Vertical-Response-Integration
It's to expensive to run on a hobby forum, I use mailchimp here but admittedly don't send many newsletters out. ( I think I've sent 3 in the 2 years I've been running this forum)

It got me wondering, if this even part of 4.x anymore and if so, does anyone actually use it?