I don't use Photobucket for uploading anymore, I switched to imgur a while ago but I still have many images on PB which are (were?) useful.
Postimage is fine, not that I use it. But I have no interest in uploading images in 0.1 sec. I usually add something extra to my images, to make any point I'm trying to get across, a little clearer.
I suppose any images we upload directly to WGT might be attachments. I'll have to Google it to find out more details.