I don't know know if it's as a result of not being reputable projects that's why the trends in the forum is not being influenced by higher or respectable memebership ranks in the forum.
You should know that despite having a section for altcoins discussions, this forum was meant for Bitcoin discussions only but the reason why the altcoins discussions section must have been created is because Bitcoin is also a cryptocurrency and other cryptos often referred to as altcoins, shitcoins, meme coins also follows after Bitcoin so there are users in the forum that have a broad knowledge about Bitcoin and also invest in altcoins.
Not only high ranked members but majority of forum members doesn't visit the altcoins discussions session because their interests in mostly towards Bitcoins and nothing else. Some others who also stays away from the altcoins discussions may be victims of either getting scammed or they invested and lost all their money on altcoins so those kind of people doesn't near anything altcoins related discussions.
Moreover, if you also navigate through the altcointalk forum, majority of discussions there are also about altcoins discussions and only few talks about Bitcoin there and majority of the people discussing about Bitcoin over there are basically people that either teleported their accounts to the altcointalk forum or they moved out of Bitcointalk forum and finds the altcointalk forum more convenient for them to dwell in.
In summary, majority of BTT members don't find altcoins safe enough to invest in that is why they pay less attention to altcoins discussions, in other words altcoins are not reputable projects to invest in.