All of them have steep fees, though it seems they all award either scholarships or financial aid to those eligible. They don’t admit just anyone. I think it’s fine to put these camps on an app. If your child was given a scholarship to attend, that is perhaps worth adding in the activity description.
FWIW, I don’t necessarily think it’s wrong to list “pay to play” summer activities on an application, but I wouldn’t necessarily list them as primary activities. My own kids did various pay to play summer programs. One program in particular was very competitive, and we paid fees as our child wouldn’t qualify for scholarships. One of the main benefits is that these programs can highlight interests outside of academics, work, or regular after school activities, (all valuable in their own right, naturally.)
Please note, I’m not referencing very prestigious and competitive free summer programs such as RSI and TASP.