Maybe this is their monetization strategy. Instead of incurring the high costs of supporting a large load of unpaid users and then trying to monetize the user base from there - maybe they want to get to revenue quickly.
http://qr.ae/1ygLq - my answer on quora regarding testing pricing while in MVP stage.
"You can figure out what they'll pay for it once you know they'll use it in the first place."
Seems a bit presumptive and opens the door for risk.