As many as you wish - the sky is your limit!
Please bear in mind that on some days/months, there will be more available studies, and on others less. We can't promise you studies every day. Also, try not to compare yourself to your friends, as they may have different demographic profiles than you, and therefore may see different studies on their account.
If you are not eligible for currently available studies, then we kindly ask for your patience. New studies are posted regularly.