Change "Advert for" to something more correct

[glennlunder]

As @sagamusix pointed out on Discord, the text "Advert for" on a production that has mention of a bbs is misleading, as only a specific subsection of productions exist with their purpose being as an actualt advert. In most cases it's just a mention, or a small part within a larger thing. Therefore, I think it should be changed.

For illustration:

We came up with "Advertises", "Refers to", "Mentioned" - but perhaps a native English speaker can come up with something more elegant that better explains that it is a mention of, or a promotion of, a bbs, but the entire production is not an advert for it.