1. Is this as a result of low /lack of signature campaign
2. Or it's because of the low traffic that there's low number of campaigns
3. Or maybe both
4. Or The forum is still it's growing phase and haven't gotten to the height of having active users per hour in Thousands or reached campaigns that would be interested in promoting their product.
All the possibilities that you foresee here refer to the number of campaigns. Here I would add one more option
5. There are not enough members here who will publish quality posts and thus attract new businesses to promote themselves through campaigns.
Additionally, I think there are too many boards and it is difficult to find topics and to find the correct place to post it.
Questions from newbies like "I lost my ethereum using phantom and metamask please help" are very good for SEEO, and we don't have those here..
This is the essence.
If this forum wants to grow, not only "rich" campaigns are enough, but also content that will be useful to others outside the forum. It is full of discussions dealing with speculations and what will happen if... No one searches for such things.
Also, it seems to me that forcing bounty and earning possibilities as the primary thing on the forum obviously does not produce results. As far as I can see, that part of the forum is quite inactive or occasionally some campaigns appear for which there is no interest.
A few days ago I was looking for a good place to open a discussion about some services, I believe that such topics have no place in any "discussion" section.
In general, I think that mixer campaigns may continue here for a long time, so at least we can guarantee that traffic will not drop severely.
For mixers, these are relatively cheap campaigns, even if compared to what they paid on Btt, on that side they can last much longer. However, at some point when they evaluate the results, it does not mean that they will continue if they are not satisfied.