Perhaps your dismissive attitude is one reason you only got one participant. People are not required to volunteer for your project, that’s why they call them volunteers.
In subreddit r/Rochester
In a post titled:
Only one volunteer showed up for our first NE cleanupbut thats how change begins. One person, one block at a time. Help us grow this. Come out and bring a friend to the next one! #RespectRochester #WalkingForRochester #NECleanup