thanks for the responses! ...I was lining up some BTC for a bit more GH so I was a bit upset that there aren't any contracts for sale at the moment. Sounds like this wont be an issue for very long 
Early on, they oversold. I wasn't a customer then, but it caused them a lot of grief. Since then they have been pretty careful. Usually, they have more available in a day or two. Longest I saw it go was, I think, four days. Don't hold me to that, I'm going off of an aging brain's memory 
I don't know what equipment they run, but judging by their turnaround time, I'd guess a combination of ants and dragons. If they smart, they are also buying Spondoolies.
Y'all should too
Anyway, I remain very happy with pbmining. Like all of you who bought, I made ROI within a few hours. Despite rumours to the contrary. It took me a bit longer to break even. Yes, it's a pet peeve, but this is a very technical community. Use the term you mean. ROI is return ON investment, not return OF investment. ROI can be positive or negative, but if you made an investment and it returns you anything at all, you made an ROI. The term y'all should be using is breakeven. The point at which your ROI becomes positive.