My questions are:
1. Is this spam, or a backlink exchange or something else? If I approve their pingback and make it nofollow, does this add any cred to my website in the eyes of Google, or potentially bring me more traffic, or neither or leak link juice?
2. If it is a backlink exchange, should I only approve the pingback if the other site has better ranking/links/authority than my own?
3. And if it is a backlink exchange, I would like to use the same linkbox on my own site so the other site is not visible on my blog unless someone does a mouse over. Is it a plugin?
Thanks in advance.