When we say "on brand", the meaning may change a little, based on the context, but the intent is this:

Things that are on brand for this forum are:
* Anything related to the Commander X16. The purpose of this forum is to
promote the X16 and to provide support for its users
* Retrocomputing in general: this includes content related to the Commodore
64 (as part of the inspiration for the X16), Atari 8-bit computers, Tandy
TRS-80, Apple (1 and II), Altair 8080, any CP/M computer, IBM PC, XT, AT,
and compatible computers, and so on.
* Video gaming: obviously, the focus here is on mid 80s and earlier style
games, since that's what the Commander is good at. However, we also enjoy
arcade games, modern PC games, and console gaming.
* Things related to the 80s TV, Movie, and music scene.

The kinds of things that are not on-brand for this forum would be advertising for anything illegal, gambling sites, drugs (legal or not), sports betting or fantasy sports sites, advertising for retail stores, and so on.

There will be times where something is an edge case, such as someone developing a retro style game that targets the PC or modern gaming consoles. That's going to be largely subjective, but if the person posting the link has apparently joined for the specific purpose of advertising their product, we'll probably reject the post. If the person has been around, contributed to conversations, and happens to mention his personal project once or twice, we're likely to keep it.

Yes, this is subjective, but we'll never be able have a perfectly objective policy regarding spam and advertising, so I think this is the best we'll do. If anyone has a problem with the policy, the admin team would be happy to talk about it and see if we can accommodate your needs. We are just a DM away, and we are here to help.