That's done too. But it's not just a few, it's literally 10s of thousands of individuals from places like Bangladesh who do this as their source of income. They

That's done too. But it's not just a few, it's literally 10s of thousands of individuals from places like Bangladesh who do this as their source of income. They are smart, on real devices, will solve any puzzle you throw at them, and will adapt to any blocks or locking. It's not an easy problem to solve which is why no platform has solved it (oddly, spam is pretty much non existent on HN)