I do think our friend (or friends) who are starved of attention won't be gone long. It's a pure addiction. They will have more accounts than we realise, hiding in plain sight.
Burps thread I always found unusual. It's very friendly. Most other threads I've dabbled in aren't like that at all. People fall out or dominate the thread or moderate. Burps thread seemed to be a place where you'd sort of get to know each other more. We are mostly united in our disgust of her
I think that's very appealing to the attention seeker as there was always a lot of sympathy and personal stuff. Sarah's behaviour around the ivf/miscarriage/bellys pregnancy all sent the thread into outrage and it was a great way for this poster(s) to ramp up their misery and sympathy posts.
I love a bit of speculation and that's purely what this is now..
I don't have a specific account in mind but I bet there's a regular contributor here who is one of the fake personas. A perfect way to keep well in within the group, strengthen the trust in them and feed into the hunt for fake accounts while deflecting from themselves.
The creator has been playing a very long game. This is years and years on the go. Their biggest fear must be getting "locked out" of tattle now that it's more tricky to make new accounts since an invite is required. They will have made a few provisions for this. They know that once an account is rumbled it's no use anymore.
They genuinely must have fuck all else going on in their lives.