Work comes from all sorts of places. My ex-brother-in-law, hell of a nice guy, asked me for some character voice work for a friend of his last year. It was spec work, gratus. No problem. Who knows right?
This year, that guy calls me, would I be willing to do some scripts for him for an educational sight? Yup, and this time with pay.
Would he have called me or found me on Voice123? or some other way by chance? Maybe, but he's out in San Diego, why would he be looking for a guy in New York?
You never know where that next gig will come from or where it would lead. Do you really think that the people who voiced the Simpsons were expecting the gig to last this long?
Do good work, get more work. Repeat.