They do pay if you are accepted
I’ve qualified for 2 studies and they do pay. A reoccurring problem I ran into on my iPhone was being unable to hit record. I emailed back and forth and they finally identified the problem. I have my font larger and it prevented it from working. It took a while so by the time I needed to redo pat 2, the study was over. So I got paid for a part. If this happens go into your system setting and put the font to the smallest possible size. another issue is when trying to do the qualifier questions it does the same thing. It makes it very hard to do them as you might get an inch or two on the horizontal ones. I did just upgrade from an SE to a 16. This might change it a little. There is not an accessibility button but most apps don’t have that . Patreon has this issue as well. You can only make the headings bigger