yes you can definatly make money. It is far from a get rich quick scheme, but I think I would still classify it as a decent job (even though I live in norway which has a very high cost of living)
If you are going to start out, start submitting to the big six (check the links on the right) to get a feel for how different sites work and what earning potential there is. If you find you want to add more sites after a month or so, starting working your way down the list.