I've bought 15 mhs of Zen. Makes a decent return but I got pissed off because every time, without exception, the withdrawal of BTC does not work until multiple attempts are made. I asked for my money back and they told me to fuck off. Well I am still within the window of my credit card purchase and can tell them to fuck off and there is not a damn thing that they can do. It was only $350 CDN so I may just ride it out to get my ROI as I do get my BTC eventually.
I've got 15mh too,I withdrew my BTC a few days ago,it was only .04 BTC but went smoothly,no issues & on the first try,you sure you did it correctly
Not sure how you could screw it up,but you never know
I figure 3 months at least for ROI,maybe longer if the network grows faster than I calculated.........which I've been wrong before
BTW,the Zens look to be the most consistant high payout,waffle is up ATM,but it may not last
My main worry is,if they go under,all investments are lost.Hope they stick around for 3 more months at least