Did you read the article? It's not pirating and selling as yours, its reselling. Resellers exist for almost every kind of product or service. The original provider gets more sales, the reseller makes money from taking a cut, the customer gets the product/service. Manufacturers and service providers need distribution, resellers provide this. It's like paying a Chinese company to slap your own logo on a doodad and selling it on Amazon.
The point the are claiming is that resellers don't produce anything or add value. They would almost certainly agree with your Chinese/Amazon analogy and also condemn the resellers doing that. It's a common opinion among those who build stuff for a living and aren't responsible for marketing those things.
The resellers take care of marketing your product in a market where you probably don’t have any presence.
Sometimes. Sometimes they snipe you. But yes, I agree resellers have value. I'm just saying people who've never tried to sell a product rarely see it.
The value is that marketing & sales are easily the harder discipline for most SaaS businesses.
Exactly. Why wouldn't you want to increase your sales reach? I think there's a subconscious bias on HN and similar spaces against anything that indicts the "if you build it they will come" dream.
There's also customer support. A B2B software vendor might want to let someone else do a B2C or B2B in some niche they don't have time for.