First off, this list doesn't include proven scammers. There's a different mechanism to handle those. That said, if you hold outstanding unpaid obligations from anyone on this list I'd certainly want to hear about it, either publicly or privately.
Second off, this list doesn't include nickel and dime outfits (which is why people like usagi aren't here). There's currently no mechanism to handle those (outside of reading the lending forum, I guess), but there's also not much incentive.
Third off, this list doesn't include well known, argued to death cases.
That's why BFL isn't here: if you don't know by now that a lot of people are suspicious of them and for what reasons you're beyond help.To sum up: large, dangerous, lurking just under the waterline. Taking the icebergs out of the high seas of Bitcoin finance one at a time.
This list is, as anything woman made (which you'll notice includes all men), subject to error. I will diligently endeavor to correct any actual errors as best I can. On the other hand, anyone and everyone included would claim the list itself and any part thereof is erroneous - simple game theory dictates it. Quite frankly I couldn't care less.
Finally, you'll have plenty of warning before showing up here. In general, I'll ask you some questions in whatever thread you're using to announce your thing and you'll fail to respond adequately. Note that simple stupidity isn't enough to make the cut, significant potential of harm to the clueless investor from interacting with your stupidity has to also be present.
The ListBitfinex - coupla dudes picked up Bitcoinica's source as leaked by
Taaki and are since herpderping around.
Btcjam - not a scam per se, just carries the scam-enabler torch dropped by GLBSE. Repayment rate of 77% declared by op (tho that's probably significantly overstated).
Picostocks - possibly the most laughable thing on the forum. Guy's gonna make a 100Th farm out of bitfuries and other stuff (after having bought 1000 bASIC boards bASIC never sold).
Coinlab/Coinbase/Coincrap - Multiple cases of stealing from users through the "canceling BTC sale when price goes up" scam, amplified by "pay anyone complaining on the forum" double-down. In any event their burn rate takes them out of the picture this year, so damage should be limited, but try and sit at a safe distance.
Opencoin's
Ripple - closed source scamcoin built on top of an ill baked, badly designed reimplementation of the Federal Reserve. Owned by Jed Caleb (the first guy who stole from MtGox). Supported by some clueless VC funds, which led to absurd claims on obscure blogs ("larger than bitcoin") and a lot of noise on this forum from well known shill accounts (MisterBigg, JoelKatz etc) dragging some naive/new people along.
Bitcoin Foundation. Pretends with no basis to be representative for Bitcoin. Is organized as a swindle, in the sense that it takes "donations" in exchange for "membership" (ie, like any "investment club" out there) but it never reports income and expenditure. The head and treasurer are the same person (Peter Vessenes), a known confidence artist from the start-up congame, who already blew up a so-called Bitcoin venture or two (above) and who is actually using the donated Bitcoin for his own purposes on his own account. Sells reputation propping services to various known scams (BFL, MtGox etc). Steer as clear as at all possible.
MtGox Notorious fractional reserve "exchange". Famous for having nearly destroyed Bitcoin in 2009 and for having tried (unsuccessfully) to
brand it as a Ponzi in 2013. The principal (Mark Karpeles) is currently on the hook with the DoJ for having lied in filings, which means any BTC you send to MtGox is practically speaking a donation to his defense fund.
BFL Collected large sums of BTC from the general public for the past ~18 months, principally via heavy google advertising and with the help of meanwhile notorious scammers and shills (like gigavps, lukejr, quite a pirate-like list) on the pretense they are to deliver ASIC mining technology. Blew most of the Bitcoin on hookers (
Josh Zerlan) and blow, managed to buy some functioning chips from competitors (much like their earlier FPGA deliveries consisted of sanded off chips bought on the cheap) and are for the past few months trying to parlay token prototype deliveries into more orders. Any BTC you send to BFL is practically speaking a donation to the forum lolfund.
The ex-Listicbit.se - old site, suspected at some point coupla months ago of running as bucket shop. They did however fully honor their obligations to MP (to the tune of ~500 BTC) and made various changes to their code. I've not looked it into it since, and have currently no reason to suspect shenanigans.