I think it's hilarious when I see identical products, usually like ones that were crowdfunded, on sites like Aliexpress for a fraction of what they're officially selling for. They're unbranded, but you know the product is likely the same and probably made in the exact same factory. If you're going to outsource your manufacturing to China so you can sell it for ridiculous markup here you deserve to have your IP ripped off.
For example, the official Prometheus light in the first picture sales for $69 for the brass version, $79 for the copper version. A clip can be bought for an extra $20. Second picture features a visually identical product with no branding listed. It sales for about $18 and includes the clip. I don't support counterfeit or bootleg products, but all things considered these are probably the same.
I recently considered one, but declined once I realized they were just some cheaply made Chinese product with an exorbitant markup. I went with an American made and proven Surefire Titan Plus instead.
Official:
Ali version: