My gripe is that they miss the mark by targeting new dads. The reason dad jokes are great is they are the first jokes your kid understands. So I would think dads of 4 to 9 year-olds would be a better target.
The high you feel when your kid cracks up at some offhand dumb joke can't be bottled.
But the reason I love this as a resourse is that explaining jokes to a curious child develops connections in their head in a way that only a parenting rolemodel can really do. So even if it's not laugh-out-loud funny to explain a joke, if your child tells you that they do not get a joke, first and foremost realize that is a vunerable admission. Buddies will rag on you for not getting it. Parents see a gap in their kids' world experience that they can fill.