Reserved for updates
Idk why all images are small, pls click on them or the full album. Tried postimages for the first time.
Two things I learned soon after I started using postimage:
1) make sure it is set to "Do not resize my image" when you upload. Probably you're already doing this.

2) By default, the link is to a lower res version of your image, even when you do 1). But their FAQ explains you can click on the image to zoom in until the magnifying glass contains a minus sign (or there is no magnifying glass), then right click on it and pick "copy image address" to get a link to the full size image. It took me a few weeks to figure this out.
ALSO: in Geekhack, do just the {img}link{/img} without the {url} part. That way it doesn't send you to postimage when you click on the pic. And on a PC you can just arrow back and forth between images.