I'm curious, who do data brokers sell this data to, and how is it eventually used? For instance, if they know where I live and who my family is, do real estate

I'm curious, who do data brokers sell this data to, and how is it eventually used? For instance, if they know where I live and who my family is, do real estate companies buy data of people that died recently to contact my family and get a deal on my house?