I don't know if it helps, but with a RSS add-on (I use Feedbro) you can subscribe to RSS for a specific tag. I never used the RSS link for subscribing.
For the general Q&A page (https://answers.sap.com/index.html) I see no RSS link and the add-on does not detect any feeds.
This is not my area of expertise, but RSS is just a text file with specific xml tags, I guess if you open it without having a feed reader that it might look like html at first glance, but the first line in the feeds that I downloaded is <?xml version="1.0" encoding="UTF-8"?> unlike html pages which have to start with <!DOCTYPE HTML>.
As to the problem that images pasted into a question without using the add image dialog disappear - this has been the case for a really long time. It used to work for a while with some very old versions of Firefox ESR, but I don't think that anyone is still using these to check.
The problem with image pasting was reported back in the days, we did some digging, testing, troubleshooting, but the team never fixed it. I cannot remember if they responded to the request in other threads or blogs.
Here is one of the questions that I found: Bug: Pasted images are not saved in questions/answers.