rei.beate, regarding not being able to get notices on threads you've participated in but did not initiate:
Reasons that some of the other forums I've seen that you subscribe to, such as TA and Travellerspoint, have more functions than RS is because they're monetized, meaning advertisers pay to have their advertising displayed on those sites. Rick Steves does not allow outside advertising - and most of us like that VERY much - thus has a slimmer budget to work with.
There is a very good explanation about the differences in this site versus others and why as explained by our excellent (and long-suffering) Webmaster Andrew. It's also a great discussion amongst some TA members who have very recently joined the RS forum and some long-standing members of the community. You'll find it here:
https://community.ricksteves.com/travel-forum/greece/ta-refugee
A quote from Andrew's post, which is about halfway down the thread:
"I can appreciate that this new home is a bit more modest... As others noted, this is not a monetized forum, so it doesn't get as many bells and whistles."
And lifted from a helpful post by longtime member David in Seattle:
"It's always worth remembering that this forum is not funded by a large conglomerate. While I presume the company (Rick Steves Europe) is profitable and doing well (I have no insider info, just making guesses as a longtime local follower), in many ways it operates as a "mom and pop" small business. That is, on the cheap. So it's not like there's a big budget dedicated to improving and expanding the forum."
A plus? We do have private messaging....which I understand TA has recently discontinued! So there. :O)