I've got to say I'm a bit confused as well.

My understanding is that the goal behind EOS is to create a blockchain with the speed and design to be able to handle 10s of thousands of transactions/second, allowing dApp developers to create scalable dApps.

Now this post talks about how developers will likely only use a small portion of the memory they've purchased through ownership of the EOS tokens, because otherwise the cost of the memory would be too expensive compared to a centralized application.

How does this benefit dApp developers?