I enjoy using PBMining and no complains here so far.

However, I personaly think increasing prices is the wrong move while ANTMINER S3+ -B8 price is going down and a competitor sells for 0.0026 GH/s. ( 50 min. )
I see the price increase to 0.0031 as a good thing for several reasons:
1. The value of BTC has gone down relative to fiat currencies. While the cost per contract still went up, we may be paying less if we think of the fiat price.
2. Even though we buy contracts with BTC, they do have expenses based in fiat currency.
3. It shows that pbmining is paying attention to the cost of carrying a new contract, and that the price is not some imaginary/arbitrary number. They recently ran out of GH capacity. Adding the recent capacity must have cost more BTC.
4. It slows the rate of issuance of new contracts, which may not break even. Unless future difficulty increases become milder, you would probably not break even at the old or new prices.