Lets put about the campaign and promition aside first since there is bigger issue is happening now in jackbit which is about withdrawal related to the current accusation against them.
It is not good situation for a new site and they should solve the issue as soon as possible, otherwise potential gamblers from this forum will think twice before joining.
It means that what they spend for advertising in this forum will be just something useless.
Signature campaign marketing only helps to promote the casino when there is no association against the casino. Here we can see there are number of complaints where gamblers are complaining about withdrawal issues and also the OP account is tagged by yahoo62278, making things even more worse for Jackbit.

I think Jackbit should take immediate actions to sort out all the pending withdrawals requests and make a post here stating that these withdrawals issues are fixed and won't happen again. If this is not done and the tag persists, i am afraid jackbit will lose a lot of business.