In my personal experience, If I've read with one reader but still feel like I need to read with another reader to confirm and on and on it goes, then the first reader was off. That's when the excessive readings happen, I believe, is when we read with those that don't match what our own intuition is saying to us, regardless if we're fighting against it or not.
When you've found the reader that is in alignment with your own gut, then you won't feel the need to get more readings, there will be some semblance of trust there, and you'll find yourself not really wanting another for several months.
Example: When I was reading with Aries Intuition (she's retired), I'd have one reading every 3 to 4 months and never felt the need to have more readings with anyone else. Currently, I read with one main one and one secondary one when I can't afford my main one. I don't really feel the need to have more readings for at least one month or longer.
I think the frequency of readings should NEVER be more than one month apart. However, I do understand the anxiety factor, which is another giant cause for binges. At the end of the day, trying to learn emotional control is the best way to abstain from having ridiculous amounts of readings. We all do it from time to time, so no judgment on my end.