German traveler, realize that this Forum is only answered by concerned and well-travelled and experienced fellow travellers. Rick Steves Enterprises (RSE) provides the bandwidth and we have a resident Webmaster from the company but other than zapping spammers and throwing buckets of water on people arguing (very very rare) we rarely see them. Rick Steves himself does not visit here, or at least not publically.
If you click through to RailEurope they are not affiliated in any way except that RSE gets a commission when you buy something by capturing the click.
If you use the German Railway website you get instant and accurate information, even running lates and which platform to go to and where on that platform (and a better price). RailEurope can't provide any of that, and if you have a problem you have to deal with a foreign (French) company between you and the real company running the trains - Deutsche Bahn (DB).
But thanks for the compliment, and welcome aboard to the Forums.