You are absolutely right
Few days back I was surfing and I saw that some of the communities have been shutdown just because they didn't get good support
I don't know why people do this I mean it hardly takes a second to give a like and a good comment.
In my starting days on steam I have experienced the same.
As you said actually Instagram is too ahead from us.
I think as you are a part of steem curator teams, you can pick up this point in your team meetings and a program should be made like giving upvotes and decent comments to others will be beneficial for ourselves I mean something like that.
It is right, many communities came and gone, the those who are hard working and despite of hard time continued posting, they survived.
Now with Steemcurator teams it is a bit easier especially if they follow the rules they are seen and noted. It is a good initiative and we try to cover many through that.