As mentioned above, we noticed that globals do seem to accumulated within an avatar, e.g. instead of observing them from time to time according to their relative frequency, they seem to come in groups with longer pauses in between.
I do have only limited data to answer this and therefore the results are preliminary.
To get something meaningfull I did the following. I have no data about number of kills between globals. Therfore I do use an internal clock namely the sequence of the globals itself. So all I do present later on has the interpretation of “how fast a single ava is in globaling contrasted to the others”. The data was transformed using the following procedure:
1) Ranked all recorded globals according to datetime.
2) Calc. the diff between consecutive globals within ava
3) Calc. mean rank diff within ava
With this we get a measure on how sparse gloabls are within an avatar. Here are the results:
In the following "n globals" refers to the number of globals an avatar has and "rank diff" refers to the difference in global ranks. To get a better feeling about the data both variables have been binned using quartiles (i.e. every bin contains 25% of all observations).
Tab. 1 Crosstab of Number of Globals vs Rank Diff

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Avas with a low number of recorded globals (< 5) do have most of them in class 4 of the rank diff classes (1863+). With in median 2000 globals per day (roughly 80 per hour), we can conclude that in about 40% of cases there is gap of one to several days between globals. However, rank classes 1 and 2 are also quite frequently (nearly 50% in total) which shows that there is also another scenario where globals are quite close to each other.
For global class 2 and 3 we get a similar picture except for rank class 3. It tends to be higher than in global class 1. Rank class 3 starts at about 2-3 ours till one day. So it might be that rank class 3 and 4 do represent gaps between online periods. I can imagine that one group of players logs in nearly daily playing for 1-3 hours.
Players in global class 4 would then be the hardcore players, that are online several hours per day and every day per week. If we look at their rank classes we see, that most globals are in rank class 1 (e.g. about every half an hour). Nearly no globals are recorded in rank class 4.
So I do interpret this data as a distinction between player classes and that rank class 3 and 4 do express playing pauses. Therefore I did any subsequent analysis only for rank class 1.
Fig. 1

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The mean of the rank differences within an ava shows a normal like distribution. Its mean is about 13 globals, so they are quite close to each other (within 10-15 min).
Fig. 2:

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There are no differences in mean rank between global classes. This implies, that the time difference in globals is the same for the different types of players. Please don’t confuse this with the frequency in getting globals. This can’t be analyzed here. What we get is, that the same rules are applied to the different player classes. So if a player that plays from time to time will observe his globals in a short period of time quite like a hardcore player.
We can confirm again that globals do accumulate, what we need now is to understand why? Should this be some kind of adrenalin kick? Or maybe you have to spend first some money to get a global feeling? Who knows?
Edit: Team globals have been excluded from the analysis.