I believe we removed it, as the exchange rate was a pitiful 5 credits per CP. Not worth your CPs, believe me. Save up for a ships/vehicle and sell it if you need the money, but otherwise join a faction and let them supply everything you need, and they will pay you too.
I got a good sum of credits off of CPs. You just need to save up for some type of asset, then sell it. Also you can make custom items to use in RP. A fancy suit or a black jacket, fancy glass vase, a 6 pack of beer... Custom NPCs are useful for various things, but cannot perform special tasks like building or Ahlazi Farming. You can also give them talking scripts.
Either way CPs are valuable, maybe even the most valuable of all things currently. Use them wisely...
Just don't bother even thinking of exchanging CPs for credits! One of the biggest disappointments I had during my early time in the game was when I accidentally exchanged 2000 CPs for credits, took me a while to even realise that there was an extra 10k credits, don't make the same mistake...