Sure. For what it's worth, though, we've continued to see steady signups for years and years; the concern over the ossification of a conservative site design is a reasonable one and one we chew on plenty, trust me, but as far as that goes we haven't all else aside seen active new-user interest go away.

Any other efficiencies to be gained on the technology side?

If the userbase is steadily gaining, it seems like monetizing that traffic should be inherent and profitable unless the infrastructure is inordinately expensive.