A little more off, every time
Members save an extra 5 percentage points on regular product prices with every signed-in purchase. When the 20% sitewide sale is active, that is 25% total off regular product prices—not an extra 5% off the sale price. Public product pages continue to show public 20% sale pricing; the member extra is applied in cart and checkout.
When the sale is not active, members still get 5% off regular product prices. Shipping and tax are not discounted; free samples stay free.