Spam Discussions?

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I came on here earlier this morning for just a brief moment after waking up unexpectedly. I was browsing through the interests when something caught my eye. The first page of discussions held new ones with very little details, often only a few words. This got me to thinking. I've read in other discussions how people don't like spam responses that have nothing to do with the topic and are just advertising their link. When you see the kind of discussions with little description and a few words, do you think of them as spam as well? Do you think that some start these kind of discussions just so they can earn money? How do you feel when you see them?