I use WP Fusion with ActiveCampaign and absolutely LOVE it.
I’m not a noob either. I say I love WP Fusion having spent the last 8yrs working solely on building memberships and subscription websites using most of the top rated WP membership plugins on the market.
Running a “membership” based off of assigned tags coming from AC is just insanely powerful and at the same time incredibly simple.
Highly, highly recommend it 🙂