Hmmm, that's a question for someone like Ryche. It might have something to do with the shroomies having easier access to more substrate than with a crumpled cased cake.Time for an experiment, try to get the best of both worlds. either tomorrow or sunday I'm going slice my blueing cakes (three cakes that fruited once but got dehydrated b/c they were too small I think) horizontally into two smaller cakes, then case that with Verm in the other half of my terrarium.
currently I have one cake that is in it's second flush, with many more pins than the first time (though of course they won't all be shroomies) so I'll leave it alone. Otherwise, the other 4 cakes will get cased with pure verm and I'll post the results whenever things start happening
peace
Grover