Below was taken from Reddit but it can be obtained from the UK Government's company house, where all businesses file their financial data. The information below is specifically on the revenue earned from Jagex.
All values are in pound sterling.
Total employees 2014: 466
Total employees 2015: 338
Subscribers 2014: 1.773m
Subscribers 2015: 1.945m
Profits 2014: 755k
Profits 2015: 20.4m
Subscription revenue 2014: 29.5m
Subscription revenue 2015: 37.6m
Microtransaction revenue 2014: 14.7m
Microtransaction revenue 2015: 19.6m
Developers employed in 2014: 277
Developers employed in 2015: 158
Employees dropped because they scrapped content such as Transformer's Universe. Customer Support staff remained the same.
What's notable from this data?
1. Runescape subscribers increased, rather than decreased
2. Microtransactions account for almost 20million to the company
3. Subscribers are still the best source of revenue for the company, though closely followed by MTX
4. Profits went from less than 1mil to over 20mil in just one year
5. We can see why a Chinese company would want a company that can go from 1mil to 20mil in a year ...
If you ever needed evidence that microtransactions are literally keeping this game alive, it's from these stats. If they cut out the microtransaction revenue, it would be almost entirely their profits.