Using the “/WAS/forum_feeds”, was a valid method to collect the RSS feed, until middle of last week when it seems that this resource has been disabled.
This second method was not initially available but seems to have been enabled when the forum has been updated a few months ago.
There is only one major area of attention :
The first method was including all sub-folders located below the root-folder mentioned in the “ids=xxx”. And this format was allowing to list a set of forum IDs, separated by commas, in one unique link.
The second method require to declare, one by one, each forum folder as there is no inclusion of sub-folders and no way to list several forum folder IDs in the same link.
And the RSS icon at the top of the web page to ‘Click here to add RSS feed’ is just a link to the current web page as well. Seems a bit circular to me.