AMA Answer #18 (Patreon)

Ruth makes her money by selling her tickle tools online. But how can her buyers know if they work? Simple! She makes demo videos of her using them on her willing volunteers!

She goes by "Manic McAnac" in her videos, and puts on her goggles to obscure her face. And whoever she has as a victim, Ruth makes them don a blindfold to also protect their identity. Why? Would you really want a lot of people to know how ticklish you are? At least that's the reason Ruth gives them... and it works.