Sometimes they can be challenging or overgrown, so you have to know what you’re doing and be prepared to turn back if necessary, but I owe a lot of truly incredible experiences to this app.
Since it uses OpenStreetMap you should consider updating it for others later. Don’t think you can do it in Organic, but it can be as simple as in a browser adding a note to a trail about what state it is in.
There is a follow up post as well, at the very end they write a bit more about it. And much more than 5 keys.
Yes, look at this blog post from Factorio team, it is a few years old by now but still valid
https://factorio.com/blog/post/fff-303
They start talking about G2A about half way through the post. Basically they much rather see you pirate the game than buy it through G2A
Ah yes, who doesn’t like C Plus+?