You may recall us confirming back in Devstream #100 that we are looking at changing how the Daily Tribute system works. 15 Devstreams later, we had mockups to show, and we relied too much on recall of that 100th Devstream to properly explain the changes, so here’s a write up of two parts: the Scaling day-to-day, and the Milestones!

Scaling Day-to-day:
  In the current Daily Tribute system, the day to day rewards have very little scaling. There was two tiers of rewards, so for example, the lower Endo reward was 50 Endo, and the higher was 80. And then we decided if you got lower or higher based on Mastery Rank times 5%. So a Mastery Rank 10 player would have a 50/50 chance and a Mastery Rank 20 player would be guaranteed to get the higher reward. Which isn’t much scaling at all.   On the new system it now scales based on the amount of days you have logged on. They increase by 25% for every 50 days. So for the example of Endo, the starting value will be 50 Endo, someone at 400 days, will get 3x the rewards as someone just starting, 150 Endo. For the veterans on day 900, it would be 275 Endo. This is just free Endo for logging in that now scales better - we know that’s not headline news, but it is better.   MR Old Endo Average   Days New Endo Average 1 50   1 50 5 57.5   200 100 10 65   400 150 15 72.5   600 200 20 80   800 250 25 80   1000 300
It’s largely the 50 day intervals that are under discussion, so let’s take a look at the changes there:   Milestones:

For Daily Tribute milestone rewards, we’ve divided them into three separate categories that will appear at the intervals listed below:
  1. Sigils and Resources. Days 50, 150, 250, etc. Includes packs like Sigil, Forma and Orokin Reactor. All existing packs will be an option for these intervals.
Includes evergreen packs like 3 x Riven Mod and we are considering adding 3 x Forma. 2. Primed Mods. Days 100, 300, 500, etc. 200, 400, 600, etc.

All existing Primed Mods will be an option for these intervals. 3. Weapons and Equipment. Days 200, 400, 600, etc. 100, 300, 500, etc. This includes the Azima, Zenistar, etc. But also includes the Lodestar Syandana and the upcoming Lodestar Armor Set!
The simple explanation here is that once you've reached a given category, you pick an eligible item from that category. We are also looking into adding a fourth category past the 1000 Milestone with more 'evergreen' rewards'. Under some amount of debate is also Milestone rewards such as Primed Mods and Weapons, being tradable. At this time, we are removing this from the plan.

As a final point, we are making these changes because the linearity and complete lack of customization of the system is starting to show its age. 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. With the new track milestones, we're hoping each Tenno will have a reason to look forward to those 50 day logins.

So stay tuned all, hopefully this clarifies the current plan!

EDIT - 2:31 PM EST
After reading your feedback, we are switching the tracks for Primed Mods and Weapons/Equipment to respect current milestones. The main post has been edited to reflect this change, here's the list of updated tracks for posterity:

1. Sigils and Resources. Days 50, 150, 250, etc. 2. Weapons and Equipment. Days 100, 300, 500, etc.  3. Primed Mods. Days 200, 400, 600, etc.