I know they have access to certain parts like their prices but can they read their juicy details for free, once she has verified that she is the girl (I imagine by confirming a text sent to phone number)?

If a provider has her username linked to her profile she has limited VIP, which allows her to read her own reviews, but not others. A provider can also pay for VIP, (like any other member) which gives her full VIP priveledges.