Since VERB tweeted about their sampling system is based on a Costco case study I started looking into Costco’s legendary free sample situation and compare that to VERB's

I know the Costco samples work on me. Not 100% of the time, but a good amount of times for it to pay off for them.

1.
Costco: The samples are usually given out by people who don’t actually work at Costco.
Verb's Clients: The samples are actually given out by associates who work for Verb's clients. They could tell you about, not only the sample, but all the other company's products

Winner: VERB

2.
Costco: There’s no limit on how many samples you can take.
Verb's Clients: Since you only pay for shipping/handling I'm sure you can get multiple samples but at some point it's more economical to actually buy the product

Winner: TIE (While there is no shipping cost to Costco samples, you actually do have to drive, invest time, etc.)

3.
Costco: There’s a best time to go. Monday and Tuesdays are best
Verb's Clients: You can get a sample sent to you anytime

Winner: VERB

4.
Costco: It’s all super hygienic.
Verb's Clients: It's all done in a facility

Winner: VERB (no fingers/gloves/etc on the actual product)

5.
Costco: The samples really do get people to buy the product.
Verb's Clients: The samples really do get people to buy the product.

Winner: TIE

https://www.thekitchn.com/costco-free-samples-261820

Since McKinley mentioned reciprocity:

"A brand ambassador enhances consumer awareness about key features of the product. It raises the level of social pressure on consumers who are influenced by reciprocity shopping psychology."

https://www.sonasmarketing.com/blog/costco-th...case-study