Welcome back! I've not used Quitter, but I was on Mastodon for a bit until the node I used died. Most social sites are closed. G+ cannot talk directly to Twitter.

Steemit is its own thing, but it can be a platform to build a new set of applications on. Steemit is just one aspect of it. People are building Instagram and Twitter equivalents on it too that will use the same blockchain and will also reward users. Eventually there may be a video aspect too to replace Youtube. It has an economic model that doesn't rely on ads, which makes it pretty unique.

Whether it can scale up to world-conquering numbers is still to be determined, but it seems to be able to handle a lot more transactions than Bitcoin.

I'm interested to see where it goes and having earned several thousand gives me a nice stake in it. I do intend to spend some of that. There's a few things I need.