Is BigTime free-to-play?

Excuse me, could you please clarify for me whether the BigTime platform is free-to-play? I'm particularly interested in understanding if users can access its features and participate in its activities without having to pay any upfront costs or fees. Additionally, I'm wondering if there are any limitations or restrictions in place for those who choose to play for free, compared to those who might opt for a paid subscription or membership. Thank you for your time and assistance.