I recognize my kids are not the target audience of summer reading programs so I don't sweat that it doesn't really fit.
Plus our library's prizes suck (like, bookmarks and pencils).
DS just brought home a plastic cockroach as his first prize.
DD estimates time. DD estimates 3/4 minute per page, and then estimates time read when she finishes books. She doesn't bother tracking the grazing reading of the newspaper or magazines lying around.
Neither are motivated by the little prizes, but are motivated by the top 100 reader contest, which last year required about 10-12 hours of reading each week.
