I'm not sure how far I should go here, and my word is all I can offer. But Pbmining did, in private, reveal quite a bit to me including the identities (actual, not virtual) of the people involved. This, while not conclusive enough for a courtroom, was sufficient for me. I am confident that they are a real company based on that, and said so. I do find it troubling that some months and many GH later they still don't wish to provide more concrete proof in public, but some of the shit they endured in their early days would make me skittish too.
Did they reveal to you a mining address or pictures of their mine? Did they also explain why they are mixing coins and why payouts occur every second instead of every block?
no, no, yes. See below
Is it POSSIBLE that they are (a) a ponzi, or (b) using the BTC they gather to invest in something other than mining and pay out AS IF it were mining? Yes, it's possible. In the case of (a) I would think they would have already folded, and this has not happened. In the event of (b), so what? we get ours correctly and there's nothing illegitimate about it. Deceptive, but not illegitimate. I don't think either scenario is correct, I think they are mining at a far greater rate than what they sell. But I can't prove it.
In the event of (a), if they were not mining there is little chance they would have collapsed by now. Look at the bitcoin difficulty derivative (BDD) on havelock. It is essentially the same thing but without pretending they are mining. B.mine = pbmining customers and b.sell = pbmining. Pbmining makes money every time the difficulty increases. If difficulty plateaus and they aren't mining it will eventually collapse (or in BDDs case the game would end) but that could be a while.
In the case of (b) I'm not sure how you would find that remotely acceptable.
Jimmothy, I suspect, is bitter over BlackArrow. I would be too, had I not been too broke to invest at the time.
Blackarrow is not the only scam I've fallen for and probably not the last. Fact is there are way too many scams in the bitcoin world and many of them are far more convincing than pbmining.
They know scams are thriving in the cloudmining scene and still chose to make their "company" appear as much like a ponzi as possible.
Ok, the BlackArrow thing was kind of a low blow. Shouldn't have said it, but I did almost fall for that one myself. If I'd have come up with the cash in time, I would have. So it wasn't meant to be as mean as it sounds.
Back to the subject at hand, they did in this thread post an eligius mining address quite a while back, and apparently had people trying to break in to both their homes and their facility (which at the time was a rented warehouse, nothing too secure). So they went with a mixer to make it impossible to trace it back. (which they're wrong about, but it would take a great deal of effort). I answered "no" to the mining address because *I* did not personally see it. Others in this thread did.
As to (b) being acceptable, as long as they aren't running a government or some other criminal enterprise, I don't see a huge issue with it. As I said, I consider it deceptive, but if they are actually doing things to gain revenue and paying us out, I'd not see it as to big a deal.
I think we've all fallen for something a time or two. So far I've not been burned too badly, but it's more that I've not had the money to risk. First one I nearly fell for in the bitcoin world was BFL, and I'm thankful every day for my poverty at the time. I hate poverty, but I hate getting scammed worse.
I don't know enough about playing the spread to know if it's sustainable, but even so, it don't qualify as a ponzi. At some point the diff would indeed plateau. When the diff increase was very little, they did NOT decrease their price, and it looked like they still sold a healthy amount, so it again militates more to the idea that they are buying equipment and selling a portion of the hashpower. As for the payouts being "by the second", they explained that here in the thread some time back. The payout is not based on actual hashing equipment per person, but rather a standard calculator. It's an "ideal" payout. Which again, would only work if they had more hashpower than they were selling. The rate they have increased is unlikely to work within a ponzi as well.
I get a little irritated with people on here screaming "ponzi" and leaving it at that. You actually put out rational reasons why it looks like it, and I have no real problem with that, other than most of your objections have been addressed. But I don't always read the whole thread either, so my irritation is my own problem.