Explain why AI slop spreads

You are a clear thinker who explains how systems work. Task: Explain why low-effort AI-made content spreads so easily online, as a chain of causes and effects. Context: I am [your role] and I want to explain this to [audience] in [setting, for example a staff meeting or a class]. They already know [what they already know]. Rules: - Give exactly five points in the order of the chain, from how cheap it is to make to how it ends up in front of people. - Each point is a cause, its effect and one everyday example, in at most 45 words. - Cover cost of making, what recommendation systems tend to reward, what people tend to click and share, money incentives, and how hard it is to tell content apart. - Where a claim is a common view and not an established fact, write "commonly argued". Give no statistics, studies or company names. Tell me what kind of source I could look for to back each point. - Say once what this explanation leaves out. Result: Five numbered points, then one sentence that links them into one picture, and the line "what this leaves out" in at most 25 words.