There’s a plumber on YouTube (wahoo plumbing or something like that) but he is always talking about contractors who would leave a something for the customer after the job was completed! I.E pool guy would leave a note on a rubber ducky and leave it in the pool, poop scoopers would leave a note with a dog treat. Multiple pros he would talk about when doing something like that, only con I can see is time and money.
Opinions? Thoughts? Anyone implement this into their tactic?