(For those who are confused, a few days ago on twitter some random graphic designer / webdev claimed that they started the trend of using dithering in modern graphic design. People made of fun of that person. All of that is unrelated to this post)

I don't think GP meant "here" the way you are interpreting "here" (i.e., this site / that site). Rather, I think they meant "here" to mean "in the sentence you wrote."

Put another way, I think GP was asking why you think the term "grifter" has anything to do with graphic designers who are obsessed with dithering right now. Basically, you aren't asserting that they're obtaining value illicitly (i.e., swindling, conning), as would need to be the situation for a grift to occur. If they're convincing customers that their dithering product is a must-buy because dithering is the best thing ever, and the customer hands over their money upon being convinced, that really isn't a grift unless the product somehow ends up not doing the thing.

If I lie on a website, and the subsequent wave of additional readers leads me to collect tons of ad revenue, the readers have not been grifted (they still have their money) and the ad network was not grifted (I gave them legitimate traffic). If I lie to a reader in order to take the reader's money, then at that point yes, the reader was grifted.