I think you should still include the bitcoin address and ticket prize in your post to make it easier for people to take part after seeing your post.
#2
You should add more details in your monthly round threads. Like a stripped down description what BitLotto is, how it works, rules, the payment address of the month and a clickable link to your site. Someone who has never heard of your site and reads this thread won't know what the thread is even about and if there isn't an link to click they will just close the window and browse on. Make it easy for the lazy visitors!
I for once will buy more tickets. I love the transparency of it.
#2