do bugcrowd test those bugs first ? and how much we can sure of the reward after triage? just a little idea of process 
There’s actually a great Infographic which describbes the whole process, from start to finsh, for both Managed (where Bugcrowd handles the flow) and Self-Managed (where a customer manages their own programs. I definitely recommend checking it out!
Managed and Self-Managed workflows
Hopefully that makes things clearer, would love to be able to answer any other questions you might have
Edited to add:
The inforgraphic is specifically for “on-gonig” or long term programs. We do have another method, which is our Flex program and those typically run for a few weeks - and the length of time taken after submissions is often adjusted accordingly.