Microtransactions aren't the only thing that will get pushed off the chain. I already mentioned about the Lighthouse project being hindered by a 1MB block limit. Why not discuss that? Stop with the microtransactions already. Those will be free and not relevant. What is relevant is to allow services to run on the blockchain!
Using the block chain can't be free if Bitcoin is to survive in the long run. Lighthouse does not even use the space that is currently available so it's not what's stopping it.