About companies that pay for word-of-mouth posting
There are many examples in Japan of companies paying rewards for word-of-mouth submissions to LocalGuides.
According to the official help below, it is forbidden to give a quid pro quo or benefit to the contributor by the person or owner of the location, but if it is only through a third party, then there is a possibility that compensation may be paid for word-of-mouth posting by an agency, etc., and how these word-of-mouth postings with compensation are handled. I would like to know.
I would like to make sure that the part about posting with the keywords that the company intends to use is not a particular problem.
Connect Moderators have an opportunity to report and document examples of businesses soliciting reviews for pay from Maps users. The guidelines from Google are probably different from your local rules, but asking and paying for positive reviews is beyond what Google will accept.
I would be happy to escalate concrete examples from you. Please use PM rather than posting the information publicly. Maybe @Ivi_Ge can help you better than I can. So please follow her suggestions before mine