I don't have advice, just my example. In my sitch, I choose to respond to these communications. They're emails, and few are "funny" stuff, but it happens. It's more on the "useful" or "relevant" spectrum. For a while, I went almost dark and my W started asking what was the problem. I also realized that part of the problem in my relationship was that I was non-responsive to my W, so a 180 for me was to be more present. I don't know if it's a good idea and frankly, no vet has weighted in on this strategy yet.
I think I gave you some advice before: your response should match the quality of the input. Don't answer "hahahahaha" if it's a "haha" kind of text. Raise the bar: show him that you're sophisticated and somewhat hard to please, that he's rewarded when at his best. Men (and women) like to be valued. And we know when we made a good or a lame joke. We respect the women who laugh at our best efforts and stay silent when we're lame.
M39 D6 D3 (at S) S 2014-09 D 2016-09
"You can't start a fire sitting around, crying over a broken heart" - Bruce Springsteen.