I invested once in a ponzi scheme project. Never got my money back with any profit they have been promising 
But was it real scam, meaning they stolen people's money or did the ponzi ended without you getting your profit/ funds back? Did you even know it was ponzi or were just disguising they real scheme as some kind of legitimate business (like mining, trading etc.)?
Nobody is going to believe me but thats okay.
(...)
I chatted with the scammer for a few days, posing as a skeptic and I told him if he could prove to me that he could flip my $100 into $200 I would send him $800 to flip into the $8000 he promised.
So I sent him $100.
A day went by and in my mind I was thinking, yep, this is what I get. But when I checked my balance on one of the Visa Prepaid cards - voila! $200 something dollars and a couple of cents.
(...)
I chatted with the scammer for a few days, posing as a skeptic and I told him if he could prove to me that he could flip my $100 into $200 I would send him $800 to flip into the $8000 he promised.
So I sent him $100.
A day went by and in my mind I was thinking, yep, this is what I get. But when I checked my balance on one of the Visa Prepaid cards - voila! $200 something dollars and a couple of cents.
I do believe you. I recently chatted with someone like this on Facebook. When asking for evidence of his profits he sent me video showing computer with his forex account or something like this open. I took this as a hint that he's trying to scam me as I wanted something you can verify (there are websites were traders can post their trades in real time so you can see their performance). Only reason I talked with him was that I couldn't find any fault with his profile, everything looked legit, he had photos and all.
But getting back to why I do believe you - I had intention to do something similar, just with other kind of scammers. And your post... it's my "schizophrenia" (I'll maybe separate topic about this) kicking in again - 2 or 3 days ago I had a chance to perform my act, just wasn't really ready to do it - both mentally and financially, as it would require "investing" (risking) a bit more than $100.
Overally - congrats
