I don't understand the "even if" comment. This is the one benefit of these social platforms. If the attention really motivates people to do something good, then have at it!
https://www.youtube.com/watch?v=2OkGk2YRSnw
There's also an explosion of channels where professional landscapers and pressure washers do the occasional free job on a house in desperate need while recording it for YouTube. It's great background TV and likely more effective than any kind of paid advertising.
Think of all of the "I rescued this kitten from a well!!!" videos, only to find that that's the only type of video that channel makes, ie they're throwing kittens down wells.