The idea is great! I was initially excited about Periodix. Using Linkedin on autopilot sounded very good. Then there are the positive reviews. I immediately bought Tier 3. Then came the disillusionment: the UI is not intuitive. It's difficult to understand. The operating instructions are very spartan and are not sufficient to get started with Periodix. There are simply too many questions left unanswered. After a corresponding learning curve and a lot of trial and error, I realize that I can only use one Linkedin profile for one sequence, but not for all sequences. There's been a problem with the proxies since yesterday, and I've been waiting for the system to work since then. I'll take a look at it and ask for my money back if necessary. What's annoying is that I've invested a lot of time and haven't been able to work with it yet. The support responds very slowly.
The current status of Periodix appears to be beta status. At this point I cannot recommend Periodix.
Speaking of reviews: I'm also amazed at the positive reviews that I can't share. I have exactly the opposite experience

Pros:
Great idea
Clean UI
Import from LinkedIn very easy

Cons:
Support responds very slowly
No csv import
Deleting lists not possible
Data from the archive cannot be reused (no possibility found)
UI is not intuitive
The help documentation is not enough
Too many bucks