Optimize for passive contribution

I just installed and started i2pd following the Arch Wiki at https://wiki.archlinux.org/title/I2P

I opened up the welcome page at 127.0.0.1:7070, which looks like this:

Are there any settings at the welcome page or tweaks that I can apply to the config file to optimize my router? All I want to do is to contribute bandwidth at the moment, not necessarily use the network myself. I have a 1 Gbps connection that never gets saturated.

I saw for instance a setting called "Transit tunnels limit". Is it beneficial for peers if I increase this?

Thanks in advance!