I hate it as well both these things are well.
I know they want to keep any potential buyers updated, but when you watched them for their art, and all you get is their adoptables, auctions, ych etc. images being updated every five minutes whenever a new bid is placed or a something is purchased it does start to get annoying.
I also hate it when an artist updates an image, but then doesn't state why it was updated. Did you change something about the picture or in the description? Please say why you updated so I know! Otherwise, I feel like they just do it to try and get the picture more attention.
In terms of stream image alerts, why can't they just use the artist's update function rather than submitting and deleting or updating the picture every time they stream.
For me, the situation is more annoying, since my browser likes to ignore me deleting notifications and brings them back after a few minutes. So I go to DA thinking a new image or journal is up, and it is just my browser re-showing the same image five times in a row.
Ugh! Sorry Mosco for the longish post. Got a bit carried away I guess! ^^'