Driving my Mach E with free charging

I'm not sure why I don't hear more about this and EV drivers I speak with don't really know about this, but I'm charging on Ontario for free. Basically I got a level 2 charger for$300 from a company, once I put through 1500kw charging my mustang, I got the$300 refunded, so basically a deposit. I also get paid $.11 akwhr when I charge at home, I pay approximately. 10 overnight so I'm profiting 1 cent per kwhr when charging.

This cost me nothing and I only found out about it in July when I was shopping for a proper level 2 charger.