Recently I was searching for the best profitable ASIC miner machines that mine SHA-256 algo. I don't know which ASIC miner to choose to start Bitcoin mining. I found a website named https://www.asicminervalue.com/ which gives real-time mining hardware profitability. I don't know how accurate the information is. The most profitable Bitcoin miner I see is Bitmain Antminer S19 XP Hyd (255Th) which gives $0.31/day after the Electricity cost. The top two Bitcoin miners Bitmain Antminer S21 Hyd (335Th) and Bitmain Antminer S21 (200Th) is not released yet (According to this website). This leads me to wonder how Bitcoin miners making money these days. How anyone can start Mining Bitcoin with this profitability while the block reward will be divided after the halving?

It seems the most profitable coin to mine is Kaspa at this moment. Currently, Bitmain and Iceriver produce ASIC miners but when I search for their official website. I found two websites for Bitmain, https://www.bitmain.com/ and https://bitmain.org.cn/ Which one is legit?

Another four websites of Iceriver, https://www.iceriver.company/, and https://www.iceriver.io/ and https://iceriver.eu/ and https://iceriver.cn.com/
Which one is legit?