You should have a Table with payment ammounts for each job
You can sort of do this on the crowdflower dashboard. It'll show how many tasks you completed for each job
there's very few jobs... in fact there's no jobs available for new members...
how can newmember have access to jobs?
CrowdFlower is aware that there hasn't been enough jobs available for new members, and they have plans for fixing it in September with an "entrance exams" feature: http://crowdflowercommunity.tumblr.com/post/123562758255/entrance-exam-coming-september-2015