Honestly, the Bitcointalk numbers have been going on a downtrend in terms of traffic and engagement for the past few months, especially after that mixer ban. People have moved onto other forums, while others just decided to log out.
I got this impression too, without looking at the detailed statistics. I don't know if it's because of the mixer ban, but it seems to me that the activity on the forum is significantly weaker.
They probably evaluated the results at Bestchange and may have recognized that they had reached the maximum on the forum. Looking at the history of sig campaigns here, many services ended the campaign after a short period even though they needed a slightly longer period. 4.5 years is quite long, it requires a lot of patience and of course money.
Some people lost spots in their campaign which led to loss of motivation to visit the forum.
But as for those who followed mixer campaigns and "teleported" to altcointalks forum - from my observation, I think most of them are just now active on both forums rather than switching to ALTT completely. But of course if you spend a lot of time there, then you'll be spending less time here etc.
Not only that, merit distribution is keep declining too.
Many users nowadays like to distribute their merits to their own gangs or locals even though the users they merited have a same quality to other posters. There's a big difference when you post and you get paid or get merit with post without receive anything.
It is a completely wrong attitude that forums are used exclusively for the sake of signature earnings. Once this attitude changes, maybe things will get better.
BTW, why do you think that promotion on Altcoinstalk isn't possible?
Because the traffic on altcoinstalks is small but I don't have statistics that distinguish it.
It's just my own opinion that BestChange probably wouldn't consider campaigning there, but if they do then that's even better.
Right now only mixer campaigns are there, if there are none then it might drop even more.
But we'll see, if BestChange does marketing elsewhere someday we'll find out on which platform.
For mixers, forums like Altcoinstalks are one of the few, if not the only, channels for promotion.
I am also sure that the primary goal of the Bestchange business is not to have its own signature campaign and to give money to forum users. Earlier, I expressed doubts about the effectiveness of their campaign because the participants were a bit lazy, it seems as if they did not pay attention to the campaign goal.