Thankfully most vendors or their marketing agency affiliates that engage in this sort of thing aren't particularly clever about it, so identification of puppet accounts to ban isn't too difficult.
If you are going to be shilling for the vegan processed food industry, at least use oat milk (which you can make at home) or soy milk (which is actually delicious - at least the processed versions I had in Japan).
for example, right here on HN was a buncha posts about Moka pots. the coffee pot, that is.
also started popping on lemmy and reddit. then gone. haven't seen much discussion before, or since.
I own a couple of said pots and noticed the uptick since I'm a fan, but the suddenness of it was a surprise, and points to marketing efforts.
but also keep in mind it's a startup-focused new aggregator and is explicitly for pushing your new product, esp. the YC ones.
it's a concession you have to make to use the site regularly, and I can live with that.