Too much advertising may not be good. Unless you are there with a mark a notch in the industry, otherwise your photos and ideas might just be good material for people to copy, modify and claim as their own.
VR, AFS 50mm F1.8G, third party speedlights, 25mm extension tube, 85m...
I agree with you about the time consumed. This reply is also a time consumming thing, because I am not a native english writer :) I also agree about "there may be some benefit". Please allow me to make a full report: I have a blog for about two years with more than 400 posts (DT photo with some words related). I have also an Facebook account from about one year, also a G+ account. The only thing I noticed are some referrals. But they are lazy. They register on DT and never uploaded or buy photos. But, maybe, one day they will start this business and one of them will become the next Yuri. :) Hope this will be within the first 3 years :)
And now my own conclusion: Earnings graph is a flat line in the last 2 years. I don't know, maybe only social media prevent the line to go down?! :) Who knows?! Maybe is that "wall" thing, many people described this phenomenon in stock business, when you continue uploading but the sales are the same.
Another thing: on fb and g+ I have lots of friends, but this is, again, time consuming. The real friends are in the real life. And, from virtual friends, the ones I am really attached was made here, on DT message board. There are beautiful people in this world of photography. God bless them all, it's a really pleasure to be here! You are one of them, btw :)
Thanks for the comment - Alvera. I have to agree, my friendships on DT are often more meaningful than 'friends' on FB :)
The 'Wall' is a factor in that you tend to increase you uploads linearly, but the database is growing exponentially. However, if you are in more niche areas I think you can break free from that and at least keep your earnings growing linearly...
Pertinent points. I have a science-based blog and use some of my science images there. (I take them with my personal camera periodically at my day job.) I also know some bloggers who solicit images at ******** and other places. I have been suggesting they check out DT.