How does a BIXI subscription work?

Sure, here's a questioner's tone description based on the paragraph "How does a BIXI subscription work?": "I'm curious to know more about how the BIXI subscription system operates. Could you explain the process from start to finish? Do I need to sign up online or through a physical location? Are there any upfront costs or monthly fees involved? And how does the payment system work - is it automatic or do I need to manually renew my subscription each month? I'd also like to know if there are any restrictions or limitations on how I can use the bikes once I've subscribed. Lastly, how can I cancel my subscription if I need to? Thanks in advance for your help in clarifying these details.