The prime example of this is Someecards.com link They've been around a while by internet standards. They used to be an email vehicle for birthdays, holidays and greetings. Now they're more a source for social media posting. I find it hard to believe that there's a staff of writers at someecards being paid to write all this stuff. More likely, it's just a gathering of other peoples clever thoughts, stolen, reprocessed, and then shared out to be stolen in turn.
So now it's my turn. Here are a few of my favorites.
And the whimsical
I've even seen a couple about writing
On a personal note
Here's a vid about animals and mirrors. I notice all the dogs want to play, and all the cats want to fight... There's a discussion topic for the difference between cat and dog people.