Difficulty history:
1. pre Feb. 16: 0.014043
2. Feb. 17 to 23: 0.017247 (7 days)
3. Feb. 23 to April 12: 0.036228 duration (51 days)
4. April 12 to 15: 0.01076 (3 days)
5. April 15: 0.041216.
According to
http://mrx.im/pts.php, the difficulty will recalculated in 4000+ blocks.
When the difficulty decreased, many people came mining. Profitability was very high.
But as soon as the difficulty increased, we must mine 50 days with nearly zero returns.
We support PTS but with the actual prices of PTS we mine for no income during 50 days.
Once we have finished to wait 50 days, many miners came back and pump all blocks during a few days and want away.
I prefer a difficulty adjusted after each block, as the darkcoin, instead of the current situation.
The original retarget was supposed to be every week, such massive bumps in network hashrate defeat this purpose.
That wasn't supposed to be a problem when PTS was cpu only, which made difficult if not impossible such things.
So either a per block retarged, or per week (fixed), or less blocks retarged.
We are FAR from the 5 minutes block interval
Now you manage your network as you wish, for my part, I will pump when the difficulty is low.