I give that site a try with very small amount of my bitcoins. Unfortunatelly I cannot find important information: for how long I rent their mining capacity? For ever? For one year? Does anybody know? (I admit I didnt try their support.)
You can simply email them from bug report. Its actually lifetime they work similar to cex and scrypt. They charge 10% of mining coins as charges. Yes all that information is missing and should be put up there.