Selling customer bases and what are the risks?

Question

Marketing

Customer bases. How and why are they sold? Is it of great use to the seller and the buyer from this?

Answer 1

The competitor's customer base is fire
. I have small competitors feeding from mine. I had to improve the service ten times in order to somehow level the effects

Answer 2

there is sense, but the field is gray
although in the USA, if the user has checked the checkbox, it is completely white, if it does not apply to personal data