>>9095666smarks is a contraction of "smart marks" which distinguishes this type from a regular superfan for their being "smart" to the business, very familiar with the carny aspects of it instead of taking everything presented at face value
its meaning is closely associated with the similar sounding "snark", a word which describes contemptuous ridicule; by extension, a smark is specifically a person who gets off on hating, which is why you'll see these types being contrarian toward whatever is pushed, hate-watching shows they don't like in order to have material to mock, praising obscure aspects of the business that are not directly tied to increasing viewership and profit, and other considerations
smark means many things at once and it would be a long list to name every thing, but the essence is the negation of the mark: instead of loving what is popular, they hate it, and most everything outflows from that
