They're worth gushing about, they're good probes!
The copper squares make low inductance ground planes, e.g. by sticking them on top of a chip you are probing and soldering them to a few ground pins. Then you can rest the low-inductance bayonet ground connection on the low-inductance ground plane and browse with the tip. At GHz frequencies this technique is important for signal integrity, but I've always found it a gigantic ergonomic step up from trying to wedge the walking-stick ground between pins (or, worse, against a single pin) to get a decent connection, so I pretty much ignore the walking-stick grounds and use bayonet + copper pad whenever I can't use the inches long "antenna clip" ground. I went through the provided copper pads quite quickly and now I have a roll of adhesive-backed copper tape for the same purpose.