PACER is free if you use less than $10.00 per year. If everyone used RECAP, there would be no need to access any document more than once.
Edit: I've looked on www.recapthelaw.org and couldn't find any clarification on this.
[1] http://www.pacer.gov/announcements/general/exemptnotice.html it's the third result when searching for [pacer recap]