With Autopin you can automatically follow and unfollow users, invite them to
your boards, create pins based on keywords as well as liking and commenting
other posts!

When you start, you set a number of tags that can identify your kind of
business/account. Then, you select at what speed you want to operate. Finally,
you choose which actions you would like your account to do.

Hit running, and the account will automatically perform all these actions on
your behalf.