I have been a registered member of namepros since 2016.
I have seen the above article in the past 5 years.
However, when I read them again, I found some new things.
However, these are not specific ways to invest in domains.
I would like to know the posts that have presented specific investment methods.
Unfortunately, most strategies and methods from 5 years ago, may not be valid today, especially the ones that were niche or trend specific, since those can spike and die fairly quickly sometimes.
There's lot's of valuable information on NamePros from various members and what works for one, may not work for another and vice versa.
Everyone does it differently and it's not one size fits all.
Since you asked about specific members experiences and references, I can share some of my older posts that may or may not help in your research. Most of which, is still valid in today's market(s) and may not have been included in the helpful topics pages you said you already read.
The above are just a small fraction of some of the things I've personally shared over the years on NamePros. They range in time-frame from over a decade ago to a few months ago. There's many, many more, but the above should be enough reading material to keep you occupied for a little while.
Though, I must reiterate, we all do it (or did it) differently. What works (Or worked) for one, may not work for another and vice versa.
At the end of the day, a domain is truly only worth what a seller and buyer agree on.
I'm sure others have a lot of thread topics they can reference as as well, I just wanted to help get you started on some potential reading you may not have seen yet.