What is the "real purpose" of this checker may I ask? It was my first time using the it and didn't have a very good experience. Next time I will just stick to Whatsapp for upgrade confirmation.

I was trying to use miles to upgrade a redemption group member from Y to Y+ in December. When I searched the flight in the tracker, it showed the brown single seat icon, so I thought okay, great. I then contacted CS via WhatsApp, but the agent told me no confirmed upgrade seat was available and that they could only add me to the waitlist. I showed the screenshot of the brown single-seat icon, and this is the reply:

"I totally understand there might be some confusion. Just to clarify, the indicator shows that the chances of getting an upgrade are currently low, which means there's still a possibility that seats may not be guaranteed. I was able to put her flight on the waitlist and you may monitor her email address or your account if the upgrade has been confirmed."

While I understand it was my fault for not reading the icons legend properly (higher/lower chance for availability), generally people interpret seat icons as actual availability when searching for redemption / upgrade. Green double seat icon = 2+ available, brown single seat = last one left, and waitlist icon = waitlist.

30 mins after the the agent put my redemption group member on waitlist, the brown single seat icon was changed to waitlist icon.