I imagine that's not enough, because changes to bus routes tends to be bursty. For example, I'd imagine thousands of those transit systems to suddenly add route

I imagine that's not enough, because changes to bus routes tends to be bursty. For example, I'd imagine thousands of those transit systems to suddenly add routes in September to coincide with the start of the school year, and then remove those routes in April or June to coincide with the end of the school year. With a team of ten, some of those systems' maps wouldn't get updated until Christmas, which would be too late to be useful.