I would like to host in scrap only mode.
For that I turned off iron, copper, coal, uranaium and crude.
And then I made scrap frequency to be highest possible. Even with that highest scrap frequency, for most seeds the nearest scrap positioning isn't so great for a new player spawning. This issue can be solved by simply giving a nearby scrap ore patch close to spawn lake. I understand this may not be the default desired thing to do, therefore it would be nice if something like this can be optional setting.

try the new release and let me know. Have to set mo setting "use as main resource" as true

Oh wow, that was fast response, thanks a ton @RedRafe.
Although, I just tried and I don't see the option you are talking about. I am upgraded to Scrap Resource 2.0.0, and my Factorio version is 2.0.77.
Can you double check please?
It would be really awesome if this can be fixed within 14 hours from now. I have to reset my MTS server tomorrow for this week's run, and Scrap based railworld is what players have voted for.

Ah I see, your latest changes have been for Factorio 2.1, is there any possibility of making it backward compatible for 2.0?

Actually I understand its not really possible to easily make backward compatible, I will just try to find the best seed so that scrap location is kinda acceptably close to spawn.

I'll re-release them with 2.0 tag

Use version 2.1.1 for Factorio 2.0, lmk if it works

It worked, thanks a ton!