Read the forum guidelines
Can I become a CoxWifi hot-spot using a router running DD-WRT or OpenWRT?
In short, no. You need a Panoramic gateway for that. Why would you want to?
Users aren't monetized for doing that?
No, Panoramic renters are not compensated for enabling their Hotspots. It's not your rental...it's everybody's rental.
I have seen some that use a media bridge router to connect to Cox Wifi and funnel there BitTorrent traffic through it. That way their biggest bandwidth usage didn't count against their cap. That's the only reason I can think of to WANT a Cox Hotspot.
Connecting to a Hotspot doesn't count against your data cap?
AFAIK nope. Reddit agrees.