I think that member (Reddit on the blockchain) is the **upper limit** of what should be stored on the blockchain as content.
I won't be the judge of that. But honestly (no pun intented) storing large articles seldom makes sense. But I think having an option to pay for storing certain articles could be(--^ attempt at fixing my sentence :-p) usefull. But default behaviour should be storing on the blockchain, because it if often not neccessary.