This gets them two things, one concrete, one illusory.
They don’t wear those bright yellow outfits for nothing. They hope that by being noticeable they will gain legitimacy in they eyes of the public and get new suckers into the cult. Rotsa ruck guys.
What they *actually *get is cred with the already brainwashed. “See how important Scientology is? We are first responders whenever there is a crisis, showing off Hubbard’s tech by giving touch assists to the poor victims! We are on the verge of clearing the planet! Now get out your checkbooks…”