If you stream on Twitch, log in with your Twitch account and your tower becomes yours: it gets a ★ in the city and on the live channel, and Mil Torres starts keeping your daily history (best rank, time in the top 10/50/100, peak viewers, awards of the day, how many viewers spotted you with !tower).
You get a weekly summary and a page to share: miltorres.com/?c=yourname.
What is stored: a daily summary of your channel's public numbers, only while your tower is claimed and never more than 90 days. Your Twitch login is only used to check it's you: we ask for no permissions and keep no token. Release your tower at any time and everything is deleted.