Currently, the description of the spam flag reads as follows:
Exists only to promote a product or service, does not disclose the author's affiliation.
This wording is very confusing because it's unclear whether the post has to only exist "to promote a product or service" and "not disclose author's affiliation", or if only one of the two has to apply to use the flag. For instance, is it still spam if an answer very clearly "Exists only to promote a product or service" but does "disclose the author's affiliation"? The current description doesn't provide a clear answer to this.
I found a relatively old post talking about removing the second half of this description from the question flagging dialog, to which Shog9 mentioned that:
There should be an "or" there, but I feel like we had some reason for not putting one. Can't remember what that could've been though.
Shog9 Jan 15, 2016 at 16:35
So, to make this more clear, could we please reword the description to something closer to:
Exists only to promote a product or service or does not disclose the author's affiliation.