Hmm, based on the current dividend rate, it's a 230 or so day ROI (assuming no difficulty increases -- which we already know is false). I'm wondering why people are still buying into this.
Is there something I'm missing? If the dividends are already at 230 day ROI, and are going down every week or two... I don't see it breaking even for a couple years if it does at all.
The thing you're missing is, try to find anything else that gives you a better deal. If you try mining yourself you'll have to deal with preorders that may or may not come. You can buy AM USB or Blades which is cheaper than these shares but you'll have to keep it running for a while at your own expense. How about investing in AM shares? They won't pay nearly as much in div/cost for a long time from what it seems. The BTC investing market is the most profitable and, if you want, you can go on wall street and do stocks with a 7% return a year.
Right now, even with difficulty increase, we are getting over 10% a month. Find anything in the world that will give you over 10% a month and I'll be glad to follow you into it.
EDIT: I do realize that starting a business might be a good idea depending on the business. I get to sit on my ass and get 10% a month.