Hi guys ,
I'm aware that when I add new traffic source such as Decisive into
http://ad.leadbolt.net/conv?track_id=REPLACE&clk_id={externalid}
Does this means that I have to constantly create new traffic sources in Voluum (Leadboltcamp1 ,leadboltcamp2 etc...) when i create new campaigns in Leadbolt ?
Another question : For this postback URL ,
http://ad.leadbolt.net/conv?track_id=REPLACE&clk_id={externalid}
Do i use curly brackets when given the track_id or not
Example : http://ad.leadbolt.net/conv?track_id={331912}&clk_id={externalid}
Thanks for answering in advance! 
No, you wouldn't use curly brackets because the 331912 value is not a token - if it's not something you want
What you want is to have track_id={token} so that you don't have to override postback URLs for every campaign.
This is easy - just change it to http://ad.leadbolt.net/conv?track_id={var10}&clk_id={externalid}
Now, in your traffic source setup for Leadbolt in custom variable 10, put something like trackid | REPLACE | Track ID in the boxes.
Then, when you use this URL in your Leadbolt ads, make sure to change the REPLACE word to the appropriate track_id value for that campaign e.g. 331912
This way you will tell