I'm honestly surprised that they ever considered launching a project like this without making it free software.
So am I surprised? No.
The drama that took place earlier this year when there were several denial of service attacks against Mt. Gox, causing the price of BTC to drop so that it could be bought cheaper by the attackers and their friends is way less likely to happen to Ripple.
Unlike transfering BTC, sending XRP from one Ripple user to another is free and confirmation is instant—no need for miners to confirm the transaction.