Riven Info
/rinfo
This command will show available Impact, Puncture, and Slash that the riven can roll for the weapon variants, popularity from official and bot sniper sources, and desired stats for selling.
/popularity
This command will show the most popular weapons based off the amount of unique rivens seen on listing websites within a specific time period.
/lastweek
Similar to popularity, this command will instead show data from official sources.
Keep in mind that this data is very unstable/unreliable, as they do tend to break and/or forget it exists.