The captcha implementation doesn't help to prevent hacks, injections,... those are the main unresoluted true problems that freebitco is facing from time ago.
It's implementation, is a manouver to regain our confidence in their platform, but it has no real utility for users, neither add a new layer of safety to the platform.
Its only task is avoid that people with bots can claim the free faucet spin, nothing more, so they are reducing how many money spend into the faucet, which is a red flag that we must be aware of it.
Until they don't solve their true problems, is better not add cash into the platform.