X-rated Bob wrote:
Characters take up space in the database - and the font size used doesn't matter.
Correct, but any formatting requires the BB Code to be including as part of the text, which also counts towards the character limit.
If the signature images are not stored in the database that underlies GFSA then all that is necessary is to store the URL - which would be stored as text and will be subject to the same limits as any other text.
The problem with images is a different one. While the images are remotely stored, if there are a few on a page it still affects both the page load times and the physical length of the pages (especially given ZA bandwidth constraints). Most folk do not know how to optimise their images for the web - or don't bother to any more.