Blower 5060 Ti's from Alibaba, good idea?

Asking price is 580 USD on Alibaba, maybe stacking a few of these together for a "power-efficient" system is a good idea? They have 8 pin connectors as usual.

I'm aware the 3080 20GB exists for 500 USD with 25% more bandwidth, but they require a larger PSU and run hotter also toasty memory modules on the back. On the contrary, 4 x 5060Ti only needs a 1000W PSU.