I think they've said they don't actually enforce the usage limits, so you can add an additional subnet router and they largely don't care (because they haven't

I think they've said they don't actually enforce the usage limits, so you can add an additional subnet router and they largely don't care (because they haven't put the engineering into enforcing the limits, because it doesn't actually use up appreciably more resources for them when you exceed those limits). I think they do enforce the user limits though.