They would almost certainly escape into the wild and breed with native or natural species, creating problems like how asian beetles are replacing ladybugs, and earwigs spread like an invasive species, not to mention African honeybees displacing other species of bees.
*hat tip Ace of Spades blog
Who cares about how many crickets they would feed you? Numbers wise flies or beetle grubs take a lot less input to generate protein than say a cow sheep or pig it also takes far less time to generate it.
that doesn't matter though, it should be used as animal feed not human feed.
Conservation. Of. Energy. Energy input equals energy output. Feeding the world with insects will still require massive crop farming for insect feed at a time when countries are signing onto the WEF fertilizer reduction plan. Lower crop yields equals fewer bugs.
Dipshit greenies think that eating bugs means eating from a Chinese street vendor, with two deep fried grasshoppers on a stick. In reality, it means eating thousands of insects. Every day. And shipping feed and processed bugs around the world. It changes nothing.