You might see that 100 jobs are available in the list of jobs. After you have worked for a while, for example, completed 10 jobs and return to the list of available jobs, instead of finding the expected other jobs, you are not shown any more jobs.
This is because the list of available jobs always represents a momentary situation. Other Clickworkers apart from you are probably working on the same jobs or customers have added new jobs to the system.
Unfortunately, we cannot guarantee the availability of jobs.