Looking at my 2014 monthly stats , made me realize that istock is transforming to SS ( at least for me as a non exclusive ) .
The sub sales ( subs + PP ) i have at istock are almost the same as the ones at SS  , and my credit sales almost equal the ODD's at SS.
A few years ago i wouldn't imagine that the RPD would be better at SS. 
But i 'll keep uploading , as they are about 24% of my income.
I do know it's a race to the bottom with prices , but don't get me wrong.
Reading all the threads here will give you pretty good reasons to quit XXstock for lowering prices , YYstock for misbehaving its contributors , and ZZstock because sales are slow there ...
That would leave us with one or two options ( one in particular )
Full time microstockers ( not me ) are already looking outside of micro , and the rest of us will keep on uploading until it is not viable any more.

A friend of mine has a Sony Rx100 ( the first one ) as a second camera and most of his photos get accepted.
I tried it a few days ago and i am seriously thinking of buying one ( its quite cheap now ) so i can carry it always in my bag , and don't miss subjects.
The 7D + lences are too heavy to carry around everywhere i go everyday.
Plus it has 20 mp , so you can downsize a little bit. 

But i wouldn't recommend the RX100 or the G1x as a main camera for stock. As people said above , go for a dslr ..