fb and tweet button are return back

It's not a "new" feature, but it might be newly added to this new layout. It's only been live on the site for a handful of days. Our earnings depend on how interesting and valuable our posts are. If sharing your posts on Facebook brings others here, and they interact with your post by responding and posting comments, you'll earn more. If you share it and nobody visits your link, you won't.

The benefit is that, by announcing your discussions in Facebook, Twitter, Pinterest &c, you may get more people to read them and you may inspire others to join MyLot. Of course, the more people who read MyLot's pages, the more money MyLot is likely to make (and that will increase everyone's earnings) and the more people that join MyLot, the more lively the community is likely to become. Sharing your posts doesn't directly affect your earnings.