To be fair she's more honest than most who want you to send them money before meeting up. She makes it clear that sending the dosh in advance doesn't necessarily get you a shag.
She's not being honest at all, it's a blatent rip off and the part about not guaranteeing is just an attempt to push the "donations" higher
I am 32
Having a quick scan through the blog, it sounds like she is pimped by the boyfriend.