I've been using ActiveCampaign since it started and it's good unless they do not like affiliation marketing, in fact they're against accordin to their TOS.
But they have a feature i like so much: "GoTo" option, which allows to make the prospect 'jump' to a part of the automation.
Attention: "role based name" email prefixes such as support, webmaster, info, contact, forum, service, affiliate, admin, traffic, partners, marketing, etc., for our member accounts are not permitted. They are acceptable for a vendor listing, but not for the member email. This is due to bulk email processors scrubbing them for delivery due to extremely high bounce rates. Please apply for membership using a personalized email prefix. Something like firstname.lastname@example.org.
If we discover you signed up with a role based name we will give you only one message to change it. After 3 days your account will be removed if the email is not changed.