Before revision:  We find  that dynamic cache instantiation has the potential to provide substantial cost reductions in some cases, but that this potential is strongly dependent on the object popularity skew . We also find that selective "Cache on k-th request" cache insertion policies can be even more beneficial in this context than with conventional edge caches  .
After revision:  We find that dynamic cache instantiation has the potential to provide substantial cost reductions in some cases, but that this potential is strongly dependent on the object popularity skew , and that selective cache insertion can be even more beneficial in this context than with conventional edge caches .