All users on this forum have specific reasons joining this forum, such as adding insight, adding friends, marketing purposes and because the airdrop requires them to register for this forum. Apart from that Bitcointalk can also be a place to make money, most of the users who are here cannot be separated from the signature campaign on their profile.

It is undeniable, money is the main attraction for someone to join here. Of course there is reciprocity as well, companies related to Cryptocurrency will be assisted in promotions as a result of this forum having very active discussions. This forum is very coordinated, there are rules that users who have joined here cannot violate. Such as spamming, copying and pasting posts from other users or other sources from the internet and making posts off topic. All general rules are attached here https://bitcointalk.org/index.php?topic=703657.0.
This is what differentiates Bitcointalk from other forums. In Cryptotalk and Altcoinstalks the discussion is less in-depth, this is a consideration for companies, so they are less interested in promoting their business there.