I've only ever stumbled across it once. This was during the trial of the two killers of Brianna Ghey.
The comparison with MN was quite marked. Many, many Tattle users were sailing very close to contempt of court. A MN user turned up here, on one of the very few threads dedicated to the then-unfolding trial, and tried a similar trick. The thread was pulled - as prompted by users of MN ourselves - through fear it could legitimately prejudice a live case.
The content of the 'Tattle' thread was grossly, possibly criminally, irresponsible. And, yes, prurient, as a PP alludes to in relation to the Letby trial upthread.
I haven't explored 'Tattle' beyond this brief occasion, and won't be doing so if all it is is a dull 'celebrity gossip' site. They are relentlessly tedious. The royal boards on MN, which I studiously avoid, are grindingly obsessive and boring enough.