Personally unless you are keeping exclusively non-symbiant invertabreas and large clams I dont see the need to supplement with any plankton types. I used to use these products on a regular basis and started having a noticable phosphate and cyanobacteria problem. After some research I learned that Bio-Plankton and most any Plankton and Invert food supplement raises phosphate levels and encourages undesirable algae and cyano
I have stopped using these additives for about 1 year. I do recommend supplementing your fuge with a very light (1/5 dose) of a plankton but that would be it. As long as you have sufficient lighting and a mature tank your animals including inverts should be fine without these supplementes. You have to be careful since many reef tank supplements do very little or nothing at all and yet manufactors claim they work wonders.
As for a rating at feeding your inverts some of the higher end products would score a
6 or 7 out of 10 in my books the sad part is most of them score a 10 out of 10 at raising phosphates and encouraging cyano
growth. Just My2cents