What about contacting them first to get approval?
Even though they are probably too busy to respond, I think the issue here is that most companies have never even heard of Altcoinstalks.
Right now a campaign manager can copy the thread over if they want, but if there is none, there is not much we can do about it.
(Excuse my uncharacteristicly terrible grammar - Samsung autocorrect is much worse than iPhone's.)
I think contacting them is the first step. That way, not only do you get permission, but if they're not familiar with this forum, they can get more information and show interest in representing themselves here. That would be good for both parties.
For me I'd say they probably haven't heard about this forum or are simply not that interested because of it's traffic compared to that of btt... We have some campaign managers here as well who still manages those services on btt but just few of the services they manage on Bitcointalk are brought over here. They might have probably tried to convince their clients but not interested.
I don't think bringing their services here without their consent would be right. If they can be informed at first then it will be okay at least with their approval...
It's possible that some of these companies might not be interested, but that would be unusual, as they should be interested in being represented on as many forums as possible. However, I also believe other companies are unaware of this forum, and NotATether's proposal would be a good opportunity to know about Altcoinstalks.