No. For the US, the DoD spends exponentially more on Post-Its than one of these "missions". But if you're China/Iran/North Korea/Russia, you don't even have to spend that money at all. But again, the money isn't really the thing. It's just a comment.

The effectiveness of the leaflets greatly depended on the number of people that actually found them. Social platforms allow you to have your post placed directly in front of the eyeballs of your target. You even get analytics on the campaign.

I was just using old vs new techniques to show how much more modern day shenanigans are