I know little about financial instruments but is this not just an idea to create fix term 'Bonds'?
What price for a short term price rise?.. Is that just another 100% delegate, created to pay those rewards?.. All very well for the whales but us mere mortals curse at the FED for similar.. might that be then seen as a solution Ben Bernanke would endorse.. how about fixing the economy rather than printing mo money eh?.. perhaps we can do better than rewarding the rich, so the rich get richer? BitShares already suffers from a perception that those with delegates are accruing a tonne of BTS.
I'd prefer to see solid steps that build confidence, rather than reward loyalty and frankly those who are for the most part insiders. I'll keep suggesting put in place those elements that instil confidence.. a regular robust review of who is getting paid delegates - and making those business cases highly visible; milestones; a clear list of what is unique about BitShares; a Mission statement; a Vision statement.. etc etc. Once you've got those, they'll act as a great attractor and a catalyst that will make any marketing more effective.
Price rises follow from an influx of investment. If current investors are tapped out, then find new audiences or expand on the types of audience you already attract.
Such change as will affect investment are solid change - get some new devs on board - partner with some project that is struggling and make both sides stronger.. Omni/Mastercoin looks weak, I don't know if they have devs looking to jump or partner. Other tough steps will make a difference too.. legislation .. partnering with ambitious forward thinking tech like Overstock.
The idea in the OP might help if that is proposed as something familiar like Bonds.. perhaps that is a very good idea.. sell long term 2;3;5;10 year bonds.. but then I wonder those who might be interested, could be those who would support you for free.. angels.. do they exist?