I tried the scud dealio for betta enrichment treats and it was a disaster. They ate everything in sight-snails, plants, and each other.
For cheap, easy access supplemental live food, just put a cup of water outside for a couple days and you will have plenty of mosquito wrigglers that almost all fish enjoy and are nutritional. ( Unless you live in the North Pole or something, which I believe they are even found there.)
After the warmer months are over, I'd check out another live alternative, but not scuds.
Just my experience with those lil bastards. First I thought they'd never multiple as a food source, never saw them, then I had to nuke the tank to get rid of them.