There are enough employee sales that at 70%-90% off, they have a good chance of finding what they want. But, it's like any sale- you never know what will be there. My SA HAS said " why don't I just give them back my paycheck?"

So no- its' NOT considered a "pre-spend" per se.
Scarves- they are entitled to choose 1 90 a season, and get a discount on any others they may want ( and probably on other items as well). Note that the scarves are part of the required uniform for SAs.
Bags HAD been different- an SA needed to be with the company for over 5 years, then they 'apply" to buy a bag, etc. It's a process, and like customers, they may not be "offered" what they asked for. Recently, a few bags popped up at their sale, but that may have been a one-off.
And before anyone even THINKS it- NO! its NOT "unfair" that they get a discount or sale occasionally. They work insanely hard, put up with WAY too many impressively annoying clients, are always public facing ( so need to have their "smiley" faces on all the time) and generally deserve whatever bonus their employer gives them- just like any of us get from our employers.