I would like to propose that we add how popular is each sitelink to WDQS. This would allow queries that order results by wiki article popularity. For example, this query lists Wikidata items without French labels but with French articles, ordered by how often they gets viewed in frwiki.
The link above is using my experimental server that combines both Wikidata and OpenStreetMap data in one database. Take a look at some other examples related to "pageviews" (in the examples list). In depth information about the server: