I suppose it may not be there for actually taking it, but it does serve as a good demonstration of the realistic risk for average people running relatively low-value PHP sites. If nobody thinks it's worth the risk of exposure for a quick and easy $1k in Bitcoin (at the time I'm writing this), why would anybody bother hacking a site that's basically worthless, like the dinky little Wordpress blog I run?

This does effectively make the statement that, there probably are exploits out there for this, but even with a non-updated version, you're not at much risk unless someone with serious resources thinks they can make pretty big money from compromising your thing.

That's always the case for a novel exploit. There isn't a lot of value in popping somebody's PHP blog, so people who've invested time and money into a zero-day exploit have little incentive to use it for that purpose.

The white hats want to extend the time before an exploit is in the hands of the masses who might do so just for the fun of it, and the black hats want to use it on high-value targets.

random sites generally don't log carefully, or watch their logs if they do. so the risk to hacking them is low. this site almost certainly logs very aggressively. so the risk to hacking it is high.

based on differential risk, attackers will choose targets differently. they might reason that the risk/reward on this obvious trap is not worth it. but on joe shmo's php emporium, the reward is less, but so is the risk, and it might pencil out.