No monthly fee. I don't really like services that charge for this data.

I prefer to make it available for free and then make the money by signing people up for bookies that they might not normally use.

Any specific reason for doing this instead of just charging people for using the tips? Are your users generally skeptical of accuracy of tips and as such not likely to pay?

Just feel it is better to provide the service for free.

Maybe at some point in the future I will consider a premium tier but it is not on the roadmap at the mo.