All rules that cover a booking are checked together. A booking is only allowed if every booking limit that covers it still has room, so the strictest limit wins. Benefit limits never block a booking. Each one only decides whether the member keeps that cohort's price.
Booking limits are switched on by Nettla. Not every club has them. If you don't see Booking limits under Settings in the sidebar, your club doesn't have the feature yet. Contact Nettla to switch it on. Once it's on, you create and edit the limits yourself.
Which rules cover a booking?
A rule covers a booking when all of these match:
the player: all players, or a cohort the player is in;
the booking type and the court;
the day and time, if the rule has day and time rules (based on when the booking starts).
Booking limits (hard caps)
Every booking limit that covers the booking must have room for the whole booking.
If one of them is full, the booking is refused, even if other limits still have room.
An Applies to all players limit also covers your members. A higher member limit doesn't override it.
Benefit limits
Each benefit limit is checked on its own.
If a member's allowance on a benefit limit is used up, that cohort's price no longer applies to the booking. The member pays the price they'd pay without that cohort, which is usually the standard price, or another cohort price they qualify for.
Example: giving members more time than other players
Wrong: an all-players cap of 180 minutes per week plus a Gold Member cap of 300 minutes. Gold Members are also "all players", so they're stopped at 180 minutes.
Right: put caps only on the cohorts that need them, or use a benefit limit for Gold Members (for example 300 minutes per week at the Gold price, then the standard price) together with an all-players cap that is high enough for everyone.
Example: multi-sport club
Rule A: all-inclusive members, padel courts only, peak hours, 120 minutes per week.
Rule B: all-inclusive members, tennis courts only, all times, 90 minutes per week.
Each rule only covers its own courts and times, so they don't affect each other.
Tips
Give each rule a clear name, for example "Gold: 300 min/week at member price".
Start with one or two rules and add more as you need them.
Use day and time rules to separate peak and off-peak instead of duplicating rules.