Confidentiality issues . A brand ambassador signs a fixed-term contract with a company. Once it expires, he can reveal to his target audience the unattractive nature of the former partnership or the quality of the product.
For the simple reason that scandals are powerful advertising.
It is worse when yesterday's brand representative goes to competitors korean number for whatsapp and sells them all the "company secrets". Therefore, it is necessary to carefully work with the text of the agreement that will be concluded with the company's envoy.
Approximate algorithm for finding an ambassador.

Abroad, they try to hide contracts with media personalities so that consumers do not guess about the ordered advertising. In our country, on the contrary, companies inform the masses about their ambassadors. They consider this a sign of success, both their own and that of their star.
There is no standard search scheme – small brands try to attract opinion leaders of different scales from their own clients. Large corporations find bloggers, actors and artists with a huge target audience. This will allow them to cover the maximum target audience in one fell swoop.
Here is a scheme for finding an ambassador, which is universal for all seller companies:
Research your target audience on social networks (look at subscriptions and who users follow).