Italics is a poor choice for the text, feels like it takes more mental energy to read so it's easier to gloss over.
The color scheme doesn't seem to match the rest of the website, so it's easier to write off as an ad or to just ignore it out of disgust.
The main text on the left, "Homebrew Page", doesn't necessarily register as synonymous with "Unofficial" to me, so even if someone gives it a passing glance they might just assume it's a specific version of D&D and therefore official. I'm not deep in the community though, so most players may already understand what it means.
Yeah “homebrew” is a pretty well-known term within the community to mean non-official.
Interestingly, DandDWiki is somewhat notorious for being less than accurate in many articles, I wonder how much of that reputation is potentially attributable to this phenomenon of mixing up homebrew and official content.
I deal with something similar in a bit of software I use. If I click on an appointment, I can then click on the patient name to see the patient record or the client name to see the client info. At some point someone thought they should make the patient name more prominent, so they put it in a larger font, bold, all caps with extra spacing between the characters, and now I never see it and end up accidentally clicking the client's name.
The color scheme doesn't seem to match the rest of the website, so it's easier to write off as an ad or to just ignore it out of disgust.
The main text on the left, "Homebrew Page", doesn't necessarily register as synonymous with "Unofficial" to me, so even if someone gives it a passing glance they might just assume it's a specific version of D&D and therefore official. I'm not deep in the community though, so most players may already understand what it means.