What more can I do? I haven't recommended any dishonest junk brands to anybody and don't buy them myself. Supporting companies that engage in shady practices only encourages them to keep doing it.
Soundstream/PPI are bad and you should feel bad about recommending them.
Who do you suppose is making that sort of margin on anything? The barrier of entry is incredibly low in this business model. I'm sure the 100$ amp costs about 20$ to make in China but the company slapping a brand name on it isn't pocketing the difference. It's all gobbled up by the supply chain.
Then again if anybody thinks there's 500% ROI to be made with an audio brand, just open up alibaba and give it a whirl.