There is no fourth option.
Ultimately, you never get to see the locked profile. The website owner earns money from your survey completions and ad clicks, leaving you empty-handed. The Dangerous Risks of Using Profile Viewers
Facebook spends billions of dollars annually on cybersecurity. The data hidden by a profile lock is stored securely on encrypted cloud servers. An external website cannot simply plug in a username and extract private data. Why Outdated Tricks Fail facebook locked profile viewer online
"I paid $4.99 for a 'premium unlock.' My credit card was then charged $129.99 for a subscription I never signed up for. My bank had to cancel the card."
The short answer is . There is no legitimate website, software, or online tool that can bypass Facebook’s security servers to display a locked profile. There is no fourth option
Many of these websites require you to fill out surveys, install apps, or provide personal information to "unlock" the viewer. These are scams designed to harvest your data or make money from clicks, without providing the service promised.
Facebook stores all profile data, photos, and posts on secure, remote servers. When a user enables the profile lock, Facebook changes the permission settings for that data on the server level. The Dangerous Risks of Using Profile Viewers Facebook
You are forced to download apps, fill out surveys, or click on advertisements.