User Pffrt asked for "the number of active users within the last 24 hours along with the rank". I like it, and made an overview.
I'm keeping a "running total" for posts made in the past hour/day/week. This can be used to find the worst spammers of the day by checking a few of the top posters.

Active users and top posters in the past 1h, 24h and 7d
Active users and top posters in the past 1 hour: loyce.club/active/1h.html (updated 5 times per hour).
Active users and top posters in the past 24 hours: loyce.club/active (updated 4 times per day).
Active users and top posters in the past 7 days: loyce.club/active/7d.html (updated 2 times per day).

Active topics in the past 1h, 24h and 7d
Active topics in the past 1 hour: loyce.club/active/topics1h.html (updated 5 times per hour).
Active topics in the past 24 hours: loyce.club/active/topics24h.html (updated 4 times per day).
Active topics in the past 7 days: loyce.club/active/topics7d.html (updated 2 times per day).

Bans and BPIP
Autobanned and Nuked accounts are marked in red.
Each account has a link to BPIP.

Preview


To reduce forum scraping, I cache Rank data for the last 10,000 20,000 18,000 unique users. I'll check later if this value gives the right balance between scraping and staying up-to-date (alternative: abandon data on x Ranks each update). First impression: especially Brand new users are labeled that way longer than they should be.

Limitations
I can't scrape the real rank for Copper Members from their profile, so they have their own category.
I don't count non-public boards (such as Investigations.
I don't show data older than 7 days.

Bugs?
I haven't been able to test this long enough yet, so please post if something fails.

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See [overview] LoyceV's useful data on Bitcointalk for more of my forum-related topics

What does it mean to the different shade of blue color on the list? Does it mean it has been clicked or not, to be honest, I haven't click it or hovered it on the first time I clicked the link you input here, so what does that mean? (see image below)

Regarding active users, I don't want to open new topic,
and I don't know if they are using it to create fake activity,
but my question is:

 - What to do with fake Questions asked by newbie members? (usually topics)
   1. Answer them
   2. Ignore them
   3. Report them      

It's probably a good idea to restrict from scraping Bounties (Altcoins) section.

Those are just rando bounty hunters with meaningless reports, 90% of the top 20 are exactly that.

I don't think this data is public nor scrapable. Only mods can probably see this.

I am actually a heavy poster lately. Most of the days I end up posting 10 to 20 posts or even more. All depends on my mood and topic I am engaged.

@LoyceV
It's a nice state and I see my name in the top (I mean in the screenshot) :-P
By the way, do you have plane to have a section of weekly toppers? I am sure I will be one of them most of the weeks LOL

I am not very smart in data management and analysis like some of you :-P Sometimes I wonder myself how do you and other few users play around with all those information and post so much ideas :-)

Unfortunately, I can't count alt-accounts. Before getting banned, I counted 93 posts from humanrightsfoundation in 7 days. He has only 10 posts left now

I could, but may I ask why?

I would like to have a complete list of all usernames, but that means I'll have to download 2.6 million profiles. It's just convenient to have, because now I need BPIP to get a userID when I have a username.
If I do this, a list of the last 10,000 usernames makes much more sense than just 10.

Active users and top 20 posters in the past 7d

Received merits/Number of Posts

Royse777: Hero Member
received merits: 44
Number of posts 117
Merits Per Post 0.37

LVL F: Member
received Merits: 0
Number of posts: 104
Merits Per Post: 0

JollyGood Sr. Member
received Merits: 0
Number of posts: 100
Merits Per Post: 0

dkbit98 Full Member
received Merits: 35
Number of posts: 99
Merits Per Post: 0.35

humanrightsfoundation Newbie
received Merits: 10 (*all merits received from the same user)
Number of posts: 93
Merits Per Post: 0.11

nutildah Legendary
received Merits: 45
Number of posts: 82
Merits Per Post: 0.55

TimeWarped Newbie
received Merits: 0
Number of posts: 72
Merits Per Post: 0

Wilhelm Legendary
received Merits: 5
Number of posts: 72
Merits Per Post: 0.07

Romis7151 Brand New
received Merits: 3
Number of posts: 72
Merits Per Post: 0.04

efialtis Member
received Merits: 2
Number of posts: 71
Merits Per Post: 0.03

micgoossens Legendary
received Merits: 22
Number of posts: 69
Merits Per Post: 0.32

StackItUp Copper Member
received Merits: 22
Number of posts: 68
Merits Per Post: 0.32

Carlton Banks Legendary
received Merits: 13
Number of posts: 65
Merits Per Post: 0.20

SuperTA Full Member
received merits: 39
Number of posts 65
Merits Per Post  0.60

Yaplatu Full Member
received Merits: 3
Number of posts: 62
Merits Per Post: 0.05

ClsDarwin Newbie
received Merits: 0
Number of posts: 61
Merits Per Post: 0

Numien Newbie
received Merits: 0
Number of posts: 61
Merits Per Post: 0

Pamoldar Legendary
received Merits: 8
Number of posts: 60
Merits Per Post: 0.13

LoyceV Legendary
received Merits: 37
Number of posts: 60
Merits Per Post: 0.61

alevlaslo Hero Member
received Merits: 1
Number of posts: 60
Merits Per Post: 0.02