Meta introduces limits on active ad sets and campaigns across ad accounts

Meta has set an across-account cap on the number of active items for advertisers with multiple ad accounts. The separate limits for ad sets and campaigns are each the higher of 10,000 or the typical daily spend in U.S. dollars. The two limits are calculated independently and are not added together. Paused or deleted items do not count, and individual ads do not use up this allowance. Once the limit is exceeded, existing ads continue running, but creating or reactivating items is restricted. Pausing or deleting active items frees up capacity. After increased spending, the limit may take up to 10 days to update.