Nonprofit discount — is there one?

This matches my experience exactly. The hard part is staying consistent once the initial novelty wears off.

One caveat for larger communities: keep an eye on the indexes. At a few thousand rows the difference is night and day.

For what it is worth, the same approach works with the PMPro adapter — the membership side is identical from here.

I respectfully disagree on one detail. In my setup the opposite held true, though I suspect it comes down to community size.

Tried this on a staging copy first and it behaved exactly as described. Confident enough to roll it to production now.