Help with a better business model?

Hi folks,

I launched years ago a freelancing website for my small country.

At first, I tried to make it 20% commission of each project, but due to blurred fiscal rules I switched to lifetime purchases. Freelancers buy credits thanks to which they can submit their offers to recruiters.

There are around 70,000 subscribed Freelancers, and the website generates around $1,000 per month.

I was wondering if there are other ways to make more profit as, through years, this hasn't shown any change.

Thanks for your input.