I was on level 25 since about a month. There is no more reinvestment possible, so I started withdrawing all my earnings, about 80000 satoshis a day. On saturday my account was suspended when I was ordering a withdrawal, allegedly for violating t&Cs. Since I'm not aware of any such violation, I mailed them asking for an explanation twice (inmediately and after 2 days again), and got no answer.

So my conclusion is that they are selectively getting rid of non profitable accounts (for them).