Oh, so this thread is now born-again.
I've posted here before, so this time I will try to not repeat myself - difficult at my age and given my inclination to (did someone say obsession with) wordiness.
Since first posting here I've revisited Flickr a few times, and I now find I appreciate it more than I did. Confession - I'm a Flickr member, but haven't accessed it for so long, I've forgotten my password. So it's maybe time to contact the wizards there and get a new entry-ticket.
Originally I joined out of self-interest - to promote my architectural photography and, also important, steer potential clients to my posted imagery. But on exploring the site, I found so much of same-same (architecture), much of it what I regarded as below my basic standards of image-making, that I hesitated.
Then two photographer friends told me of their experiences with Flickr. One makes superb images, and after posting a fair number of his work, discovered that many of his images were copied and used elsewhere. So he threw the off-switch on Flickr. (Interesting to note that he was also on Photo.net for the same reason, and exited that site as well. I did suggest that he should try Rangefinderforum as being far better, but he never did.)
The other, now sadly deceased, found that whenever he directed his clients to Flickr to view his work, invariably they waded through all the folders, checked out the dross - and bought (or obtained without paying) other images. So he went too.
Eventually I set up a no-frills password-protected web site for media clients, mostly book publishers in Europe who were keen to buy architectural photos. I kept it for a few years, but as time passed, I retired, my photography went in other new directions and I decided to cease my photo sales (which were reasonable but never enough to enrich me or leave my heirs with unlimited champagne and caviar money) and closed down the site. It was, to sum up all this, champagne work for only beer returns.
For all that, now and then I go to Flickr for a look-see, and find that with careful searching, I'm usually pleased with what I find. Last weekend I did a nostalgic tour of the place in eastern Canada where I grew up, and the village in the same province where my grandparents had a farm. All there for me to look at and enjoy, tho' Google Maps made my 'revisit' all the more interesting.
Equally of interest to me is that many fellow posters here also have an active Flickr presence. I will certainly look them up.
So there are a few 'fair positives' to Flickr. I think we all acknowledge this.