Posting times is a pretty interesting indicator IMO. I've noticed that if you book with an agency, let's say 1122 for example, they'll re-post the girls availability really fast after a booking. Case in point: I booked with some girl (months and months ago so forgot actual name, let's say "Steffy") at about 5 PM for an appointment at 8:30 PM. Her ad had been up since 1:00 PM that day so was really far down the LL list, like page 3 or 4. Literally the moment I confirmed Steffy at 5:00 PM another ad shot up at 5:01 PM, so I think it has a lot to do with the agencies getting the maximum number of appointments in per day so may or may not be the SP herself posting the ads.
When booking with indies, I also look at posting times. I had a total WOT in Surrey in 2018 where I had made an appointment for 10:00 PM or something, drove all the way out to BF Surrey then the chick ghosts me. Doesn't respond to texts and calling just hangs up. Stupid C~! The thing is, she was posting/renewing ads at the exactly 10:00 PM! So I was like, "WTAF??" We had agreed to a pretty generous PSE 1 hour incl Greek deal so unlikely she was getting many better offers... Although I was super excited to see her because she was a tiny white girl (4' 10" and 90 lbs), it turned out she was a nightmare/head case that I read 1/2 dozen horrible/bizarre reviews afterwards so perhaps I dodged a bullet. Interesting re: posting time nonetheless.
I often see SPs (or scam ads posing as SPs) renewing ads several times per day, no doubt in a bid to stay near or on Page 1. I have to assume there's some kind of automation on the back end of LL that ladies (or scammers) pay for to automatically renew ads otherwise the real SPs wouldn't have time to actually do any dates. I believe the VIP, Gold, and other "premium" LL accounts have that level of automation, but can't confirm 100% as I don't know that personally. However, it seems like it would be a good service, relatively easy to deploy, and of high value to paying advertisers, so I'm pretty confident in my assumptions.
Lastly, if you watch LL during late-night hours (i.e. midnight to 3:00 AM or so) you'll see an avalanche of obviously fake postings / fake ads, especially Fri/Sat nights. Many of these feature super-hot Instagram models and are clearly intended to lure the drunk, high, or totally desperate, all of whom are much more easily separated from their money at that time of night rather than during the sober light of day. And ads posted by 'legit' SPs at that time of night often use words like "party favours" "party friendly" and/or "party girl," all of which are strong indicators of hard drug use carrying a high probability of pooners getting scammed, B&S'd, ripped off, or perhaps even robbed. Hence, anything with "party" in it between 12:00 AM and 4:00 AM should be approached with a VERY high degree of caution.
Hope that helps 8clive! 'rama out.