How do people make $$ on twitter?

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Hi! I haven't been active here lately lol. Anyway, I just want to know if anyone has info. on how to make money by using twitter? I'm curious to know because I hear it a lot and maybe earn while I tweet, heehe. I already know about be-a-mag-pie and revtwt, sponsored ads which I never get any offers from. Is there an easier way to actually earn by using twitter?