[hayksaakian]

1) yes, but i don't use their "buy" button with any of my clients, just simple links to website

2) as much as any old ad platform. conversion tracking is pretty simplistic on pinterest but it exists.

3) yes, but keep in mind pinterest doesn't let you target outside of US using their self-serve ads

4) the distribution is fairly normal compared to other platforms. i have not looked for pinterest specific outliers.