Look at the services thread first.
Why? Try to see who is the one gambling site who pays quite well and with good donation numbers and advertisements.
This sites who pays handsomely could be the ones who will also last for a long time.
Why? They would need to get back all that capital that they have used.
Do not invest too much. Just try it for a month and see the differences in each site.
Yolo and Safedice.