My sister was (lovingly) fussing with me about this.
Someone sends you a text.it’s not a text asking a question or needing information. It’s a meme, a joke or maybe a link to some sort of news article.
You don’t see the text until way later. Like maybe the next day or something. Do you respond to it?
I don’t because I feel like the moment has passed. My sister wants me to stop ignoring her. Lol 
Tell her you didn’t see the text because it went in your spam folder.
For me, it doesn’t depend on when I see the link, but if I find it interesting or worthwhile. If yes, I’ll respond and/or thank the person who sent it, sometimes initiating an interesting new conversation. I don’t expect my contacts to react to anything I post immediately, and I expect the same from them. Never had a problem with that.
I’ll often respond with at minimum an emoticon.
If I don’t see it, I cannot respond.
Ever.
Plausible deniability.
I get alot ot traction by asking “Are you sure you hit send?”
If someone sends me a meme or an article or a video to watch I always watch/read then comment, no matter how much time has passed. I want them to feel they are important to me. Cuz they are.
If it’s something I need to read or watch and I can’t do so at the moment but have time to respond, I’ll say “will watch/read later.”
Pretty much this^^
Text / WhatsApp / iMessage / etc. is not meant to be real time. The idea that a meme or news cite sent at 5pm on Thu has become meaningless by 8am on Fri and should be ignored for that reason is completely bizarre to me.
Having said that, if any of my txt counterparties turns into a junk spammer, just spraying whatever random crap they found in my direction, well I don’t have time for their uncurated spew. No matter how well intentioned.
But you (me really) don’t fix that by ignoring some fraction of their spew. You fix that with a heart-to-heart live voice or face-to-face convo about mutually reasonable use of your txt channel. Which is not for them to drop a continuous stream-of-consciousness narration of their multi-channel social media input.
I definitely follow the “every text gets a reply” model except in one case: the “good morning” text that is either just a nice gesture or an attempt to start a conversation if you’re available.
But a meme, joke, link, etc? those need something to acknowledge you saw them.
My sister is bound and determined that I use my smartphone all day, every day. Texts and whatever else. She would text me on a Tuesday, saying something like, “Text me back so I know you are using your phone.” I wouldn’t see it until Friday, if I deigned to look at my phone at all between Sunday and Friday. Maybe I’d look at it Saturday. Or Sunday, who cares?
So I’d get a voice telephone call, asking, “Why aren’t you looking at your phone? I texted you!”
My response was always the same: “You want to talk with me at any time, you telephone me. You do not text. You telephoned me this time, how hard is it to do the same every time?”
It’s just that easy.
I find “Meh” to be a perfectly acceptable response.
There’s an emoji for that: 
“Why are you wasting my time with this drivel?” is also an available option.
(Perhaps now you can see why I have few friends or family IRL 
)