Quite a lot of threads use images, yes, but they are not supersized.
We have auto backup every night, don't know if that counts, but if it does thats 300mb per day automatically.
Server itself and forum loads superfast, I mean whole site opens in less than 0.5 sec. We have 2gb ram and giga on board, in addition with strong processor.
It is advertisement network, that slows down whole thing.
But anyway, coming back to my original question. Is this for shared hosting or not?