Stravax Engage paces broadcast sending automatically so it never outruns what WhatsApp allows: each message is throttled against your number's current messaging tier and against the WhatsApp Cloud API's own rate limit, and Meta's quality rating for that number is tracked alongside it. Throttling only slows sending; a red quality rating is what actually stops it.
Broadcasts send gradually on purpose. Stravax Engage paces every message against your WhatsApp number's current messaging tier and against Meta's own limit on how fast the WhatsApp Cloud API accepts messages, so a large broadcast can take a while to fully go out. That pacing protects your number rather than risking a bulk send Meta would push back on.
Meta assigns every WhatsApp number a messaging tier, which caps how many different people you can message in a rolling window. A healthy number's tier can grow over time, and a number with sending problems can have its tier reduced. Stravax Engage reads your number's current tier and uses it as the ceiling for that number's broadcasts. It never works off an outdated value, because your number's tier is kept in sync every time Meta reports a change.
Alongside the tier, Meta also rates each number's recent sending quality as green, yellow, or red. Meta reports this rating directly to Stravax Engage as it changes (sometimes labeled "flagged" for a drop and "unflagged" for a recovery), and your number's stored rating updates immediately so broadcast pacing is always working off the current state, not a stale one.
Throttling by itself just paces the send, it doesn't stop it. A full stop only happens if your number's quality rating drops to red, which is a separate, more serious state covered in What happens when your quality rating drops.
Tier-aware throttling and quality tracking exist so your number's sending behavior stays inside what Meta expects from a healthy account, catching problems automatically instead of leaving a tenant to find out the hard way that a burst of messages tripped a Meta-side restriction.