Is there any other site like DP in which we can buy and sell or earn like in here....buy doing or offering services or products or anything??? ....
yes, just Google "internet marketing forums". However, be aware that every forums has its own set of rules and many are more strict in some ways than digital point. Also, many do not allow you to promote unless you pay for it in the appropriate sub forum. However, even with all that said, there are those who make their entire living off of just ONE of those other forums. So make sure if you join another forum to read all the rules for the forum and for each sub forum, make sure to add valuable content and build up a good reputation before you just start trying to sell stuff.
Yes, but at Warrior Forum it is not called BST. Instead, they have several sub forums and they all cost to post in them each time.
There are quite a few but DP has the biggest marketplace.... But you can go to ForumPromotion.net to find webmaster forums or just Google it!