If you rely on something like this, you rely on nothing. This is like crutches for your broken architecture. For singleton roles, you could do an autoscaling group of one and do better.
Not sure why the downvotes - at least ASGs can be expanded later unlike the one-offs. Plus, you should never have SPOFs anyway. There was a comment below about not all projects being of Netflix' scale - well, there's Digital Ocean for the smaller one - EC2 is not the most cost-effective solution for small projects anyway.
