About the "rarity" of the messages (or message "groups"). What is known:
The full set of possible end messages the commander can scan on tip off mission destination is artificially (by design) divided into "subgroups".
There is a permanent link between a particular site/location and the "message group" it "belongs to" - the given location produce logs from the same subgroup for all commanders. Even more strict - it always the same log for all commanders using the same game client localisation (language).
In some cases those apriori unknown to us rules of division of messages into subgroups are simple - like all tip off related messages from planetary settlements do belong to the same subgroup - "corporate data log" (they even have that same "header"). 24 unique texts that can be obtained on so far 49 known to community locations (and while surely there are more still unknown locations - tip-off related planetary settlements - all estimations show that this set of messages is full and there are no "undiscovered" messages in this particular "CDL" subgroup).
However those rules are not as evident for the rest of messages - i.e. those produced by all Tip Off-related "crashed ships" and "unidentified wreckage".
Message "header" (if one has one) - like "crew log", "comms record", etc - in general case is not an "attribute" of a subgroup (subgroup can contain messages with different "headers").
The only "visible" attribute is probably buried in the tip off mission text (some keywords), however i have not tested this yet completely and in fact I have discovered this division "from the other side" of the problem using coincidence calculations on the known set of locations and the resulting scans using different game client localisations. This approach is purely "mathematical" and doesn't rely on any doubtful heuristic assumptions.
The result so far only visible in the last two columns in the main Tip Off spreadsheet (link in my signature - i.e. Bubble -> "GroupN", "theme"). Group names/numbers are completely arbitrarily (assigned during "calculations").
In summary for 220+ currently known locations we have this distribution:
Group# | g_name | sites# | messages# |
1 | Crash1 | 111 | 29 |
2 | Crash2 | 16 | 17 |
3 | Military | 4 | 10 |
4 | RecordDate | 7 | 9 |
5 | Smugglers1 | 16 | 10 |
6 | Expedition | 14 | 24 |
7 | Rebels | 1 | 4 |
8 | Pirates | 9 | 13 |
12 | CDL | 49 | 24 |
So one can see that nearby half (111) of the known Tip Off locations produce the logs from the same "subgroup" - "Crash1" that does contain 29 "unique" messages (in fact less than 29 "really unique", as some of them are just "modified" versions from earlier days). Another 49 locations are planetary settlements - CDL group. And the remaining locations produce logs from another 8 known subgroups of messages. For example messages from "Rebels" subgroup available only on one known location - that is why I speak about the "rarity". Yep, using 6 commanders and 6 available game client localisations 6 messages were obtained from this location, however only 4 were "unique" (after removing duplicates/direct translations). We don't know if there are somewhere any other sites that produce logs from the same particular group, neither how many unique messages this group can contain (there number of tip-off related "crash sites" in the Bubble is limited, and while we don't know
all of them I assume that
most of them however has been already discovered).
Sorry, have just discovered that the division of known messages into subgroups is still unavailable in the main tip off spreadsheet (buried in my work materials). Hope to add it soon.