I think it's a matter of choice of how members choose to show their images on here TinyPic disappear after a while which is quite irritating when going through old posts, most of the photo hosting sites are pretty poor again nothing more irritating than to have to open 6 photobucket links to see 6 photos I have posted permanent photos on here before I personally find that irritating and you are restricted by the amount of photos you can post and re-sizing them to fit the restrictions I find a pain but again I spend 14 hours a day at work and 6 in bed so I find Picasa album suits me especially for my eBay listing, believe me I have tried most of the photo hosting sites over the last 10 years and for a around £5 a year this is the best with some great features and unless you delete the album which why would you anyway? if you are a serious collector or dealer it provides a great reference too go back on, of course that is only my opinion but it works for me.
Chris