We have also raised a decent amount of money so far, so at least some people were convinced by the arguments and didn't stop at the cute hedgehog pictures.
All three things are quantised and should take 'fewer': Fewer pictures, fewer links, fewer words. Less is for things that aren't countable; less liquid, less wrong.
I have resisted the urge of promoting my blog for many months, but this is literally (per my analysis) for the best cause.
We have also raised a decent amount of money so far, so at least some people were convinced by the arguments and didn't stop at the cute hedgehog pictures.