For our initial workshop, see here: Hello all - we have some changes to report since our last workshop that we wanted to lay out in writing for you! First things first:
Cosmetic Tributes are back to permanent fixtures in your Warframe journey.
This means the Lodestar Syandana and the Lodestar Armor Set - they are married to day 800 / 1000 respectively. Next: Milestones! On the major Milestone days (every 50 days between 0-1000) you will be presented with up to 3 Choices! These choices will still respect the original chronological release, and by the next time you reach a given category, you'll see a new item appear in place of what you've already chosen (if applicable). 1. Sigils and Resources. Days 50,150,250, etc.
2. Primed Mods. Days 200,400,600, etc.
3. Weapons. Days 100,300,500, etc. 1000 and beyond! Starting at Day 1050, Evergreen reward choices will be rotated every 50 Days though the following options: Evergreen Choices A (choose one):
3 x Forma
3 x Exilus Adapter
4 x Weapon Slots Evergreen Choices B (choose one):
50,000 Kuva
7-day Boosters (Affinity, Credits, Resource)
30,000 Endo

Evergreen Choices C (choose one):
3 x Rifle Riven
3 x Melee Riven
3 x Secondary Riven
Scaling Day-to-day: Scale all the things!
     
One important thing to clarify is that the in-game items received on the non-Milestone Days in Daily Tribute system now scale based on the amount of days you have logged on. Endo is an example well documented in the past Workshop, but this also applies to Credits, Booster Durations, Resources, Syndicate Medallions, Relics, and Forma Blueprints.
The way this Scaling works is that we have chosen a base amount of a given item and applied a multiplier that reflects your current amount of Days logged in - it does vary by item type!
For example, on Day 1 I get 1 x Tellurium, but on Day 1000 I get 6 x Tellurium! More flavour! We have added custom lines and videos to each Daily Tribute which brings a Warframe NPC out to greet you on your new day. Fun flavour can be seen in action here:
Our goal from the last workshop remains the same:
We've made it only slightly more flexible while still respecting the core need to login frequently. Personalization is a huge part of Warframe and we think that this changes the Daily Tribute system to better reflect that. We've just now done it in a new iteration that still respects the time investment overall - and it's coming in the next Mainline update this PC!

Cheers, Tenno!