Direct network costs

I am new to MP1, was wondering if somebody could help me understand direct network costs (pg. 11 in H120 Appendix 4D/Half year report).

I was reading the H120 report, and noticed that revenue was 25,856k compared with H119 - 15,184k

Direct network costs H120 were 12,689k compared with H119 - 10,356k.

So revenue is growing faster than direct network costs, which is good/necessary. Is there any way that megaport would have market power in pushing these down? Perhaps if they are a "preferred" carrier or if they bring a lot of business to DCs? Conversely, is it also a risk that DCs push their costs up?