You’re looking at the marketing handiwork of Mark Walters (https://www.linkedin.com/in/markvwalters/), former Chairman of Z-Wave Alliance and CEO of ZWave Products Inc. (headquartered right up the road from ezlo in NJ). He also consulted for the board of directors over at ZigBee Alliance in Seattle, WA.
His group partnered with ezlo in 2018 to attempt bringing ZLink to market. So far as I can tell, the endeavor never really took off. Other ZLink products continue to be offered for sale online, however, some of them packaged with an original ezlo Atom (a/k/a the “Z-Link ZL100”) controller.