This is a good reason for the SPS funding be shifted from the content reward pool. As you say content rewards based on voting is a very steemit.com-centric model, and as such is way overfunded with a 75% share going to a single model. Other models should have a chance to compete for those funds too (without needing to engage in reward-pool milking).

With SPS, other models and projects can make their proposal for a portion of the 'greater reward pool' funds intended to be spent in various ways to add value to Steem.

Ultimately I would like to see the steemit.com reward pool, if it survives in its present form at all, take the form of an SPS proposal that gets a piece of the budget in level competition with other apps and their proposals.

Or alternately, SPS proposals can draw from the unified reward pool alongside posts and comments.

Either way, we should get away from steemit.com as being the primary app that gets direct access to community funding and every other model has to compete for scraps.