If you have a blog, and if you use BlogBack, you really should consider BlogBack Plus. There's a bit of enhanced functionality - you can edit and delete comments, and view and ban IP addresses, plus there's a handy admin page showing all your comment threads and the number of posts in them.
But the main reason you should upgrade is because you'll be giving the developer a bit of money, and helping to keep the system afloat. He's not asking for much - a minimum donation of $5. Go on, give back to BlogBack.