I mean that there are more applicants than jobs. Don't expect that because you can pay you should get in. Doesn't work that way. If you get selected for assessment and you pass, then you are in the holding pool. You just have to wait for a course to be offered. It could be a long wait. I do know that you got in the holding pool but not knowing anything definite is very frustrating!
As far as the other comment about getting a TR is concerned, then I strongly advise not to do so without a 100% watertight job guarantee. The FR course is good in that respect as if you get in the pool and don't get called then you don't pay for a TR and not have a job after.