Why we doubt about the 16 bit A/D headset from Emotiv as well as about many new EEG devices which came onto the market in recent years?

Since years Peter Gamma from www.petergamma.org is reviewing low-cost high-quality devices. https://imall.com/product/16-32-Channel-EEG-ADS1299-EMG-Acquisition-Module-WIFI-TF-STM32-V2.3/Tools-Tool-Parts/aliexpress.com/1005002509304952/144-112025770/en EEG devices up to 50 000 seem to be strongly controlled. And we ask ourselves if there is a violation of competition laws? https://petergamma.org/category/is-this-product-part-of-a-marketing-trust-marketing-trusts-are-forbitten-in-switzerland The community of EEG devices which is the most alive is the www.openbci.com forum. But there seems to be …