A few days ago, the Promoted Pins campaign was edited to allow all users to see the pin, regardless of location. The campaign still had a restriction that the user must be US English speaking.
The pins were also repinned to group boards with large followings. Both pins were repinned to group boards while the location restrictions were still in place.
The change made a big difference! The campaign is now spending its daily budget (Figure 1). On February 11, the maximum daily limit per campaign was increased to $30 after one of the ads spent over $20 on three consecutive days. That creative then maxed out at $30 per day over the weekend.