It is similar to what was here last week, but you can do this if you did that. There is nothing here right now. Check this site at that time.
Studies are available here, on the web.
I do not send email telling people when a new one is available. I now have over 1000 people registered, and I have enough money for about 60 per week on the average. My calculations indicate that some people who are registered cannot do a study some weeks. The latter will be sent in the next cycle. The registration allows you to specify a minimum amount for your checks.