The weekly cap was reached by a couple guys. it's roughly 318K IIRC. They grinded out 31K or so mobs in 3 days and reached the cap. and hit just a little over GC rank 100.
That is not the average gamer by any stretch of the means but bw NERFED everyone because of those guys and then implemented a CXP boost to allow you to get CXP a bit faster. Problem is as someone else stated on reddit:
Assuming you make 4k cxp per hour (that's already a really high estimate for everyone, check it yourself by playing an hour) then you get 0.25 * 4k * 3h= 3000 bonus command experience.
Assuming you are around rank 30 that is ONE EXTRA CRATE. It will be more than that if your rank is low and even less if your rank is high.
TLDR: If you are making 4k cxp/h and are around rank 30 you pay 200cc for ONE CRATE.
The CXP boosts are really not all that good for your money. You have to generate a lot of points per hour, each and every hour. Not even a good use of your money even if you are one to spend money on them.
So far other than PVP and running whatever the bonus is. Even when not a bonus, running black Talon/Esseles gets me around 1000+ CXP for 10 mins or so. Extremely easy. Hold all CXP tokens till you win DVL and open them all. Faster than heroics and no fighting for some heroic mobs.