Look, the definition of success is when you get more money than you invested in mining, right? In other words, it’s when you get positive ROI. In traditional mining, key success components are powerful equipment, low-cost electricity, and increasing coin price. In cloud mining, you also want to choose better data plan with powerful hardware as well as potentially profitable coin. It’s interesting that cloud services may increase ROI by bonuses and discounts (examples are here:
http://hashflarecode.com/ [nofollow]). And you don’t have to consider electricity cost. Anyway, both mining styles depend on your initial investments and market conditions.