I'm pretty sure Infomir is a legitimate company producing a product for a corporate market (hotels, exhibition centres, offices, local ISPs) that just happens to be the perfect device for global iptv piracy.

Dreamlink are made by Formuler.

Same thing with buzz boxes they don't have an official site. They are actually made by myGica.

Based on Amazon product url

https://www.amazon.com/DREAMLINK-T1-Streaming-Receiver-Recording/dp/B06Y63D85C

Dreamlink Android box is manufactured by Chinese company Xiong chao (amazon's product information)

Most Chinese manufacturer don't have a site, it's just yet another cheap mass production Android box. They enter the global market because Amazon bring them to you.