Nowadays, payment incentives for human research volunteers is generally frowned upon due to ethical and sampling concerns (it doesn't stop people from incentivizing participation, but payment is very regulated). If it's money you're after, looking down another avenue is probably best; being a test subject isn't exactly the best way to make money. If the main thing you want is participation in studies of your condition, you can look up the psych departments of local universities and see what ongoing studies are being undertaken by students and professors. I know my school's psych department website has a link to a whole database of psychology studies that one can log into and browse through. Something like "psych.universityname.edu" or "www.universityname.edu/psych(ology)" would be a good place to start.