I keep getting private offers from people I know?

In the past month I've received a Phone call and a Facebook message from two different people (people I actually know, NOT strangers) asking me if I'd "like to make a little extra cash." I say perhaps to see what they say and they always get very discrete. The guy on the phone call said that he... show more In the past month I've received a Phone call and a Facebook message from two different people (people I actually know, NOT strangers) asking me if I'd "like to make a little extra cash." I say perhaps to see what they say and they always get very discrete. The guy on the phone call said that he has to let me on this website to answer my questions, but will give NO details. The guy on facebook asked if I could "watch a video today and get back to him." I am not falling for these, but WHAT ARE THEY? Curiosity is killing me.
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