This issue involves relationship marketing.
Step-by-step explanation:
Relationship marketing focuses on long term relationship with customers in order to generate long term benefits than focusing on short term benefits.
Though Denise is making a lot of sales and is a "top performer", she is gradually destroying the future prospective benefits to be gained from the consumers since they are complaining about her "badgering" them.
In the long run consumers may not purchase her items anymore which will reduce sales and even get the company out of business.
This fact that it gives long term benefits gives it an advantage the marketing method Denise is using.