I get Intrested when I read the "has anyone tried the"

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I don't get why some is asking have you tried this PTC and then as the referal posted? I don't get it why would'nt you ask before you join? Then I get frustrated because I kinda wanna know about differant ptc's but then I know no one will responed cause it's gonna get deleted? what with that. anyone else frustrated with that or am I wrong for feeling that way?