I read the whitepaper. You've got a noble goal. I think it's quite similar to what CoinShield (now Niro) had planned to do-- you should contact Viz/Videlicet to see if he'll share some of his groundwork with you. Might save you some development and implementation planning.

When you guys announce a buyback, there will be some additional market effects to consider. I'll use your example of bleedcoin.

When you announce the bleedcoin buyback, during the ensuing three weeks, you'll create a pump/arbitrage situation on bleedcoin where people will continue to mine/buy it up to the buyback price plus a risk premium based on how likely the market thinks it will be that you'll successfully revive the coin and post it for sale at its proposed value-add release.

Don't forget that many older altcoins had their distribution narrowed as their popularity died out. Small holders of bleedcoin will dump into 1-sat bids and over months it may have become highly overweighted to a single holder who has accumulated more than half the supply at negligible expense. You may get into a situation where people first buy out most of the total supply of bleedcoin and then approach you from multiple "community" accounts to run a buyback, and there's very little extra steedcoin supply remaining on exchanges. Thus the price and interest will be overstated with an exit strategy of dumping against HEDG, which could affect other truly community-held altcoins' communities' willingness to participate in the program if there's no perceived value gained by a swap to HEDG.

Of course none of this may happen at all, but anytime you offer a fixed price and profit proposition in an open marketplace where you're doing the work to build that added value, you WILL get people piggybacking the work you're doing and attempting to front-run the profitable edge.