Unfortunately, yes. To pull from shelters and the like in my area, you need 501(c)3 status and those are the reps that seem to need the most help around me. Shelter staff usually don't know anything about reptile care or their needs and these reptiles sit for months in an environment that they aren't thriving in.
Also, I don't think you can even claim to be a rescue without registering with your state and I think that the state would consider all rescues as non-profit, unless I've got that wildly wrong?