There are a lot of these nowadays, and many of them are cheap. U$10 is nothing. But my question is, are they worthwhile, are they worth my time? Or are they pointless, are they just snake oil?

Are there any you would recommend? I listed some examples below that on the surface seem interesting.

Tom Torero's Daygame -- $6.50

Tom Torero's How To Flirt With Girls -- $3.00

RooshV's Brazil Compendium -- $9 (I do live in Brazil)

Street Attraction's Texting Mastery -- $10.50

Street Attraction's Pickup Question Guide -- $6.50

KrauserPUA's Daygame Mastery -- $98 (this one seems outrageously expensive, I just included it here because... wtf 100 dollars??)