Collecting Customer Data via WiFi

Has anyone heard of this company? I've stumbled upon them by looking for another free email marketing site. https://www.zenreach.com/

It looks like they customize your WiFi to collect customers data, email address, birthdate, etc. They can't login to the WiFi without it. It looks like Anthony's Coal Fired Pizza uses them, but has anyone else tried it or anything like it?

Thanks,

Steve