I think that interest being offered would certainly drive demand upwards a bit would it not? (assuming anyone outside our community even realizes it's yielding interest, as you stated)
Sure HBD can be pegged.. And has somewhat been pegged in the past, but the built in mechanisms within HIVE to perform this pegging leave much to be desired for lack of a better term. Not sure USDT is a great example as they print and burn tokens at a rate reminiscent of central banks (the printing part anyway).
The whole concept of HBD stabilizer is neat. I'm totally down with the idea..! But I'm not sure it should be at the expense of developers trying to make a living populating our network with use cases. Seems a touch counterproductive and may infer to potential developers in the future that happen to yield successful proposals that their funding is secondary to attempting to wrangle a pegged token price against a volatile market.
Partially playing devils advocate, partially expressing my observations. Either way I'm quite interested in the outcome of this and seeing if the attempt to stabilize HBD is going to play out as intended. Hope it does honestly else this was all fruitless. :/
RE: Some speculation on HBD price movements and how it impacts proposals