Oh ok I never realised people cared about that I thought it was only about getting rewards and like high scores on your posts.

How have I been using Reddit for 10+ years without knowing this? XD

But isn’t there a karma system? At least I’m seeing points on posts and comments and that’s what karma is/was on Reddit right?

Where in the EU would that be the case?

AFAIK a legally binding contract only happens once you actually exchange money for a product. That should be true pretty much all over the world as long as there’s actual laws/customs regulating this process.

Any prices/offers or whatever else you might see in or around a store are in no way legally binding no matter how believable the prices are.

Otherwise anyone can just run around with a 10/20/50% off sticker and force any store to sell them whatever they want for much cheaper.