Laughing without upvoting

I thought this was pretty funny. How many people laugh at a post or Meme but do not upvote? From seeing some of the example texts on the meme generator app, i have noticed that laughing at a Meme or Post and not Upvoting is something that is frowned upon yet humorous.

Meme Source: ZomboDroid’s Meme Generator https://play.google.com/store/apps/details?id=com.zombodroid.MemeGenerator