This. If I'm looking for a 4th or more FP+, I'm already in a line for another attraction, or having something to eat, or doing a bit of shopping. And I don't do it constantly, I take a look and if there's nothing of interest I'll stop for a while. There are threads that mention certain times of the day when FP+ seem to appear more often for various parks (other than MK).
More often than not, when I read the Disboards I get the impression that if some folks don't manage to get a FP+ for an attraction then they won't do it. Don't get addicted to FP+. You are at WDW with the grandkids. Do what a lot of folks do for these rides - get in the line and wait. You'll have plenty of interaction time with your families there.
[/QUOTE
We don't bother looking for more FP's. We do get in the lines and talk about the people walking thru the park looking at their phones, instead of their family's.