I think this is the latest way MilesBuzz has evolved. Back in the day (ie, more than 10 years ago), when a way to earn miles for a specific airline came up, this type of opportunity was posted in MilesBuzz. But it was also posted in the airline portion of FT, so there'd be competing threads (eg, when you could download a toolbar and get AA miles, it's be in the AA section and MB). At some point, the powers that be decided that they didn't want competing threads, and so those types of things are no longer found in MilesBuzz. There was some marginal protest. Some noted that they didn't check all the airline/hotel sections every day, and so there was value in having these threads in one place where more people would see them. But that line of thinking didn't carry the day.
And at some point I guess the same thinking applied to SPAM opportunities, altho I could be wrong here.
And at that point, MB became primarily a credit card forum, and much less useful (not saying it had no value, just saying it had less). And now the new twist, that OP notes.
As you can probably tell, I was one who preferred having it all in MB, but c'est la vie. FT is still such a great web site, and I have benefitted a great deal from it, so I'm not going to be overly critical. tls