NOTE: This was a tough prompt to interpret. It wasn't clear in what's meant by "UST usage" post-projects launch. The way I interpreted this was showing two things:

1. How the UST growth has gone over time
2. Where the UST moves in the Terra ecosystem around various protocol launches.

UST's Growth over Time

Let's start with looking at the UST growth over time.

1. The first bump in the UST's growth came with the Mirror launch. UST amount grew 10x within a short time frame from around ~20 Million to ~250 Million!
2. The next growth in UST was seen prior to Anchor launch as UST amount grew beyond 1 Billion!
3. Between the Anchor launch and Columbus-5 upgrade UST's market cap grew from 1.5 Billion to 3.5 Billion.
4. Beyond Columbus-5 as many projects launched, we actually saw a decrease in the amount of UST until the 88.5 million LUNA burn was initiated.
5. Post LUNA burn, additional LUNA as continued to burn which has continued to raise the market cap of UST which is now approaching 9 Billion!

https://public.flourish.studio/visualisation/8043273/

Sources of UST for project launches

In this second part of the analysis, we look at when a new project launches — what does it do to the UST supply i.e where would a user get UST from to invest in the new project. I considered these ways one could unlock/acquire UST:

1. Swap to UST
2. Transfer UST from another wallet/exchange
3. Borrow UST
4. Redeem UST from Anchor Earn
5. Unstake existing LP in Mirror and Spectrum

Once, I had these criteria the next step was to see how to see the patterns. For this I chose to use the "Number of Transactions" for each strategy. The rationale for using transactions and not amount of UST was because a few whales could skew the data in favor of one strategy while the number of transactions is the common base to all of them i.e 1-transaction per action regardless of UST transacted.

Analysis

Using a stacked chart, we see the following patterns: