At the very least they're being deliberately neglectful because they don't feel the bad experience harms their revenue because there's no other substantial competitor so they can abuse their monopoly status.
I guess they may just not care enough about software developers and figure we're mostly using ad blockers so its wasted effort and we'll develop blocklists ourselves. With no monetary value that they can assign to the ill will that it engenders they figure it must not matter so they don't bother. Pissing off a large chunk of the entire IT community via obvious neglect seems like a poor move to me, but then I've never felt that I'm cut out for management.
It feels like economy-wide that decision makers in corporations and governments have just arrived at the conclusion that there's no money / no point in trying to stop scammers (and there might be an actual cost to revenue of doing so). It won't goose their quarterly numbers and might hurt them so its better to allow it.