You keep trying to relativize their crime.
As I already said, anyone can throw at any time, but when that throw carries personal monetary gain for the players who threw, it becomes illegal.
And you are correct that if they did the same but didn't bet on themselves losing it would not be a problem and the bettors would still have lost the skins. But again you are trying to understate the importance of that little detail. It makes all the difference!
Match fixing us a crime, no matter if it's done in Football, basketball, chess or CSGO. This is not something that each organizer/developer has to state for their sport. It is in no way comparable to the betting that you bring up, as betting is allowed in general, but match fixing is always a crime.
And you didn't put it in parentheses, you put it in quotation marks, who is the native here? ;-P