Yep looks like they're entering the business but may be a little over their head. Looking at the XtremepowerUS brand. It has only a 30 day warranty that's covered by a company called Stark International. Here's a clip from their warranty:
Installation manual refers to salt as an extremely corrosive environment then goes into a section on CSI that looks like it was cut and pasted in.
A lot of the better more well-known brands are out of stock. Maybe the recent virus and bleach scarcity really has caused a run on swg equipment? If I purchased from them I would get the major brand only but looks like you can do way better on price elsewhere. I wouldn't touch the XtremepowerUS brand (made in China not US) with a 10' pole,