Again, this program was/is being tried during PEAK periods; specifically, based on the posters who actually experienced it, the week of July Fourth.
The reports came from three posters who most likely did not eat at every CS in every park that week, but did not experience it at every location at which they did eat.
Last week was apparently not a PEAK travel period (despite the heavier than normal number of Guests ONsite right now, there's no appreciable difference in the number of overall Guests visiting at this time of year).
Late July/early August was also apparently not a peak travel period during which Disney felt it necessary to run/continue this program.
Ditto for mid-August (which is, really, still summer
).
PEAK travel periods during which this program might again be put into effect (or not), in a larger number of locations (or not), might include Thanksgiving week, Christmas Vacation, Easter, July Fourth Week...