They also offer high rates on limited spots while they can just just hire average user for starters to have more reach using that same budget compared to their initial attempt on the campaign.
So you think the target should be show more signatures on the forum with low budget but hire more users. I don't think it is a good idea. Basically, it's about the quality vs the quantity and i think in the long run, the quality matters.
However, it is not any of concern if they pause the campaign. They can re-evaluate and also sometimes the new casino do not gain more users overnight specially when the competition among the casino is huge. The marketing dept. has to manage the budget and at the same time make sure that there is expected level of ROI on marketing campaigns.