CRM with email tracking opens/clicks

Im a headhunter and I have loxo for my ATS and they do a great job of letting you know when someone opens your email or clicks a link inside the email but after that that’s it.

A fellow recruiter is using a system called Interseller and there system tracks how many times someone looks at your email after it’s opened. Or how many times they click on your calendar link. For example she sent a campaign last week and one person looked at her email 9 times over a 48hour period. Then looked at the 2nd email she sent 6 times over a 3 day period.

Does anyone here use anything like this that is at $200 a seat (Interseller) or works within an ats like loxo.

Thanks