I've looked through the rest of this thread from overnight, and frankly I haven't seen anything to change my view (personal view nothing to do with moderation or FD).
I don't see a smoking gun here.
The OP was very carefully constructed using as it's basis a very old post from just after the game was first released, and a few other links. Glad to see that people are learning lessons from the communication techniques of recent political orators.
In none of these links does FD explicitly say that they have watched a particular video that the OP is so upset about them not watching. The links provided by the OP, even an email from support, doesn't specifically even say they have reviewed the individual evidence relating to that ticket. The screenshot doesn't contain a specific ticket number and it's not clear that the reply is referring to one particular incident or just a generic statement.
You should be very suspicious of evidence presented in this cherry picked type of way - had the OP released the entire dossier of all actions, with date and time stamps and clear links and ticket numbers visible for each reply, with a clear smoking gun of a lie, it might be more believable (please don't post that here but if you have it you can provide it directly to FD by PM).
I see the signs here of cherry picked items pulled from various different sources to back up a predefined position. I may be proved wrong later, but based on this evidence so far, that is my suspicion.
"We take action even against first time offenders" (from a messages linked in the OP) is very likely a generic statement about all offences and a stock reply given from support. It is not meant to indicate they are going to take action against the specific report concerned and doesn't even specifically mention Combat Logging - may well be out of context.
Now the original post from FD dated January 2015 states that they consider combat logging as an exploit and people shouldn't do it. It says "at some point, we will start taking action against commanders using this exploit". It does not say they will do that on or before September 2016 or whenever these reports were made. It also makes it pretty clear that this is going to be a difficult issue to deal with as it's technically impossible to prove that any one disconnect was done on purpose.
Keep in mind that this post was made by a dev who almost always puts "No Promises, no guarantees" against most of his posts.
So, accusing FD of being liars is not a valid accusation here. Even if you could prove that one FD support person said something that wasn't true (which you haven't by the way), that still wouldn't prove that the whole company has a specific policy which is a lie.
More recent statements by FD about combat logging have been more circumspect - they have continued to say it's an exploit, but they've also implied that it's difficult to detect reliably. I can't see any evidence linked by the OP where FD specifically said "We regularly ban combat loggers" or words to that effect.
I should also point out that SDC by their own admission are a group who tries to break the game, push the rules to extreme, and cause trouble "in order to highlight problems with the game". Such group cannot be taken as an independent body, and all reports of griefing or other rule breaking from members of this group are probably taken with a pinch of salt by FD support. Therefore the test may have failed before it even started when FD simply put tickets from SDC members on the back burner.
Frankly, I suspect SDC were disappointed that they didn't find a real smoking gun in this "investigation", so they have just spun the results into a supposed case for what they hoped they would find in the first place.
Just to close, I am commenting here on the accusation of FD being liars which I find unacceptable. It is possible that FD are currently taking no banning action against any reported combat loggers (even multiple prolific offenders), and if so, that's certainly not an ideal situation. However, if faced with a decision to take people off other game development tasks in order to spend all their time looking into combat logging reports, personally I'd rather they carry on with game development.