I didn't see commercials. But I don't see them now either due to my market, I assume.
I did see billboard ads in Orlando as well as mention in check in literature in multiple places in the legacy days. Plus Stacy and her predecessor would harp on it in the room tv when telling us about all the awesome things to do. So Disney was not being silent on it by any stretch.
As FP+ is still rather new and. A complete overhaul of a concept that now enables doing things before arrival, a marketing blitz with commercial campaign makes sense. But in my market, I see about the same level as I did during legacy.
I am not sure what you are seeing.
The commercials I recall--a big campaign for Naht-a-zu (sp?) and Disney Florida resident specials while living here.
Also the "I'm too excited to sleep" campaign.
In Virginia, LOTS of commercials for affordable
Disney vacations starting at some insanely low number for a couple years at least.
I have not seen FP+ commercials like crazy in either market. (I relocated last fall, though.)