If I'd bothered to sign up after reading "It's free to get started" then learned later about the hefty fee, I'd be disappointed at best. Since I didn't sign up, I don't know how much bait there is before the switch, but if you talk about the fee right away after the signup I guess it's sort of okay, since you didn't waste much of my time but you did receive my contact information under false pretenses.
I'll be interested to see how many takers you get at that fee level.