Yes, but on whom does it work?

Does it work because you're taking advantage of a group of people who are extremely vulnerable to manipulation? People who already struggle with impulse control, who are prone to making bad financial decisions? The elderly, kids?

We have to escape this mentality that anything that makes money is valid, that the money itself is the validation of "rightness".

Some of us, just some think that maybe enterprises that prey on the vulnerable just don't deserve to be in business. Otherwise everything might as well be payday loans and online gambling. I'm not saying OP is definitely in that category, but I would encourage them to think long and hard about weather or not using dark patterns to goose their sales is really the kind of world we want to be fostering.

On the extreme side, things like blackmail and fraud are generally illegal, even if they can make you money. Most of these dark patterns that "work" tend to follow a similar pattern: by taking advantage of the target, one can extract more money from them.

I would possibly be a terrible salesperson, because these all give me the ick. Your product should provide an offer of genuine value.

The tech field is increasingly devoid of any resemblance of morality.

I guess it's the inevitable parable of anything started by '70s hippies: sooner or later, we all sell out.

That's the real problem: selling drugs works! Forming a cartel to produce and distribute addictive products, killing anyone who gets in your way? It's effective! You're never going to convince someone to stop killing people and dumping their bodies into culverts when they're making money. It's just not reasonable to expect that, or do anything about it.

Absolutely. Maybe the answer is that everyone should just rank them up to 11 until it stops working and then people have to get creative again.

Very much agree, but also (not saying you're saying otherwise) stealing, lying, entitlement (which is possibly just stealing and lying), and scamming "work." These are checked in large part by a person's aversion to it not just by its lack of working. Of course dark patterns work. If what one says increasingly inches towards 100% misrepresention (but shy of it), people will "mistake" what's being said. "Mistake" doing a lot of blame shifting.

"You're never going to convince someone to stop doing something that is making them money." Reasonable, but I would soften from "never". There was less of it at one point—and it seems logical to guess we have less today than we'll have tomorrow. The main reason is likely that we simply didn't know about these tricks yet, but somewhere below that on the list of the reasons is that some people dropped off from doing it at lesser forms of misrepresentation. Or they made the case against it at work resulting in them either winning (and their projects perhaps did less well) or them losing and being overrun by those more willing. With losing possible also leading towards leaving, not getting promoted, or getting fired. This is just a way to say that there are people who do forgo money, they just might not be around or visible for various reasons. And, as implied by the difficulty of convincing people to not make money, their (former) coworkers prefer that on some level even if they don't believe they agree with stealing or lying. But losing or earning less money is not the same as having no choice.