Free Code Camp strongly encourages interacting with other learners and experienced programmers. They provide chatrooms which are always active and full of members happy to answer any questions you may have. Pair programming (programming with another user) is encouraged as a great way to work through some of their coding challenges.
There are also meetup groups where you can code in person with other Free Code Camp students.
Due to FreeCodeCamp being open source, you are able to contribute to the program that helped teach you how to code in the first place. It's a great way to give back and gain experience.
The teaching content provided by Free Code Camp tends to act more as an introduction than a solid learning resource. Unless you already have some prior experience, you won't have enough knowledge to get through the coding challenges and development projects without using outside learning resources to fill in the gaps.
Developers who don't know what some basic concepts of the web development are (REST, how clients and servers work, etc) will be lost. People who are also not familiar with JavaScript will also be lost.