Don't do number 1 - instead build that content on your own site. In the long run you will be better off. Number 1 is more of a way to creatively build links,

Don't do number 1 - instead build that content on your own site. In the long run you will be better off. Number 1 is more of a way to creatively build links, but domain number 1 won't have link popularity to pass. So unless it has high exact match value, you are better off not using that strategy. Number 2 - There is value in that domain buy only acquire it if you want to chuck your existing domain and 301 everything to the new one.