Its like McDonalds french fries to an 8 year old.
Almost everything that swims will eat them.
Nutritional value is almost nil unless saturated with vitamins and minerals ([acronym="Highly Unsaturated Fatty Acid"]HUFA
[/acronym]'s or whatever).
As far as suggesting to thaw them in liquid and straining - dont use tap water, get a cup and fill it with your tank's water (not much water is needed) - then strain through a net into your sink - wave net through tank-water to remove contents and viola, crazy hungry fish feeding frenzy.
But if you have filter feeders (some corals, anemones, some starfish, featherdusters, etc) - as stated above, you dont necessarily have to strain the cubes of the stasis substance (what the cubes are frozen together with).