They are saying the circuit (being capacitive) doesn’t have the electrolysis effects of the normal resistive circuit. That’s all. Look at the PCB; I work with these things – You HAVE to seal the edges with solder resist as well, to seal the system.

Maybe pay more attention to the words written.

From the picture, the edges of the PCB are exposed

Yes, they’re using a capacitive sensor; but they haven’t manufactured it appropriately to negate moisture ingress from the sides, which will delaminate the PCB.

I can tell you already it’s garbage.

From the picture, the edges of the PCB are exposed, which means it’s going to corrode in the moist soil. Avoid.

Use a capacitive sensor, and make sure it’s one that’s fully encapsulated and sealed at the area where it enters the soil.

Labor. And the fact that people are buying things that were made off of the backs of literal slavery.

I repair machines for a living, and people are buying these $100 machines, and expect a 3 hour repair session to cost them $50. It doesn’t. Even with parts available and free, at minimum I’m charging them $100. I should be charging them even more.

Most people are far too uninterested and willfully ignorant to repair their own things, sadly.

Oh, and this is in a field where all of the machines are basically open source. So there’s no single company behind it all, controlling access to things - but in a field where there is healthy competition.