They're saying that if you time it right, they won't get/hear the notification that you've checked in and you can slide into the right spot. Wait awhile and then you'll get refunded because you were "waiting so long"
Which it can work TBH, it just won't be a reliable method by any means
It did more than "a few colors", compared to today's fancy modern theming systems it was def rudimentary, but with a single click Win 98 would change colors, the cursor, the entire sound pallette and even button images iirc. I was particularly fond of the Computer theme and the Space theme lol
I don't mind having the choice at least, years ago Amazon did this with their Kindles (or maybe they still do, dunno). You were given a choice on their Kindle order page, save 40$ on an ad supported version or full price and ad-free. It even stacked (At least once anyways) with other sales they might have been running.
I chose the ad supported model... and then proceeded to root it and remove the ads LMAO