This is a follow-up to a recent Meta question: Where do EC2 and AWS questions truly belong? That question was posted by a WebApps moderator, calling attention to inappropriate migrations to WebApps. The gist of the post was that WebApps focuses on web-based stuff that acts like apps, and not hosting services.
No formal action resulted from that thread, and it seems not many SU users were aware of it. A well-meaning user just updated the wiki excerpts for these two tags to enhance the usage guidance, but the revisions reflect the common, incorrect assumption that these topics belong on WebApps (and the edits were approved by other users who were also unaware).
We need to do something to provide proper guidance for how to handle these questions, because virtually none of them belong on WebApps.
If you read allquixotic's answer, redirecting most of these questions properly will be an uphill battle, and perhaps outside the familiarity of many of the users who would be doing the redirecting and close voting. We could just decide to make these questions on-topic and deal with them here if they are asked here.
People with enough knowledge to suggest a better site for specific questions could do so, but driven by expected better resources for an answer rather than site scope.
We could decide that they are off-topic here except for content questions that are always on topic on SU. Simply close them and offer any guidance we can on where the OP could try re-posting.
We need to clean up our tag wiki information, at least removing the WebApps advice. If none of the above are viable solutions, perhaps we could encapsulate allquixotic's analysis in the tag wikis and have the excerpts direct the user to the wiki for detailed guidance. The wiki advice often isn't read by the poster, but at least it would provide ready access to the advice for community moderation. I've proposed some simplified guidelines in answers, below.
Voting on any Meta question is always useful to indicate how much concern there is about an issue. But what would be the most useful in this case is answers and comments suggesting how we should resolve this.
Note: we also have amazon-vpc with a handful of question and a wiki excerpt that directs users to webApps. I suspect this is in the same boat. The amazon-rds excerpt directs users to WebApps, but I'm not familiar with whether that is appropriate.