By "dilution" do you mean to alter the hard cap of 3.7B BTS, or fund yield from the reserve pool? [/b][/center]
I think it's a big mistake to not be clear on that point, and from what I've seen from various threads and my own reading of the OP of THIS thread I don't think the answer is well known.
Apologies if I wasn't clear, yeah I was suggesting using a worker proposal for 6 months that would NOT alter the hard cap but would use a portion of the current maximum 5BTS/sec rate.
On the subject of liquidity, I don't think liquidity is all that is required to bootstrap BitUSD when you look at exchange based crypto USD products, providing some liquidity, mostly only creates temporary crypto demand.
Personally I mostly look to use those USD products as a hedge when BTC is trending downwards. I think many people approach them the same way. So demand for BitUSD if you only provided liquidity may be temporary and transient beyond a certain point. It also may be easier for people to use existing exchange based options for those short periods than BitUSD on the DEX.
By providing an incentive to hold BitUSD you are creating new demand for BitUSD in all market conditions. So people would have buy orders on the books regardless of the BTC/crypto general trending direction. (If you put some of the yield to the short side, which is an optional variation in the OP, suggested by tonyk, yield harvesting would remain the same but you would also create new shorting demand.) This would increase liquidity by increasing demand and do so in all market conditions.
Also similar to when you have an interest bearing savings account at a bank, even though you are sitting on a lot of it, you may still use it to make and receive payments as well as buy various products and services. This would be getting people to start using BitUSD in the same way. When businesses see thousands of potential customers with lots of price stable BitUSD in their account they can buy anything with in a few seconds then they will be attracted by that potential market and utility will increase.
A good example of this is BTC. a 2014 study showed that >70% of all BTC had not moved for >6 months.
http://www.ofnumbers.com/2014/11/22/approximately-70-of-all-bitcoins-have-not-moved-in-6-or-more-months/ So the majority of BTC was being hoarded and sat on but yet over 100 000 merchants were attracted to that large potential market and offered products and services in exchange for BTC which increased BTC utility thereby liquidity. So a combination of liquidity and holding incentives may be best suited to bootstrapping a BitUSD/SmartCoin economy imo.