When a loyalty discount and a site-wide sale overlap, it isn't always obvious which produces the better final price - the answer depends on how each discount is actually calculated and whether they can be combined.
Many retailers don't allow a loyalty discount and a sale price to combine - one typically overrides the other, so it's worth checking the actual checkout total rather than assuming the discounts add together.
A "loyalty member exclusive" discount might be smaller than the current site-wide sale despite sounding more special - comparing the actual percentage or dollar amount matters more than which one sounds more exclusive.
Even when a one-time site-wide sale offers a better immediate price, an ongoing loyalty program may still be worth maintaining for its longer-term value - the two aren't always a straightforward either-or decision.