Thesis
Reward tiers are usually purchased; here you earn yours by not selling, and a specimen in tun cannot be sold even if you wanted to.
Everything in crypto dies. This animal does not.
The proven pattern on Robinhood Chain is an NFT with a real wallet, seeded with tokenized stock, fed by protocol fee revenue. That pattern works. Its weakest joint is that reward tiers are purchased — a one-time fee buys you a higher weight, which means tiers filter by capital and do nothing about sell pressure.
DSUP fixes that joint. Here you do not buy your tier. You earn it by not selling.
A specimen in tun cannot be transferred, listed, or liquidated — and that is precisely when it accrues most. The commitment device and the biology are the same object. Nothing has to be explained twice.
The failure mode this avoids is specific: purchased tiers correlate reward with capital, not with conviction. A holder who pays for the top tier and dumps into strength has done nothing wrong by the rules, but has done exactly the thing the reward was supposed to discourage. Making the tier a function of elapsed time in a soul-bound state removes that failure mode structurally — see §4 for the mechanism and §5 for why it doesn't collapse trading volume to zero in the process.