Hey, I normally feed crickets 2 or 3 times a week and Repashy diets 2 or 3 times a week. Problem is I change things up regularly so I don't have a regular feeding schedule. I guess a better way to start is to list what types of things I use to feed my geckos
1. Crickets
2. Repashy Day Gecko MRP(Cherry/Fig)
3. Repashy Crested Gecko MRP(Mango)
4. Repashy Crested Gecko MRP(Peach)
5. Repashy Crested Gecko MRP(Fig)
6. Baby Food with Repashy Calcium Plus(I have not fed this stuff in a LOOOONNGG time though)
7. Passports Frugivorus Gecko Diet
Home Made Fruit Mix (Frugivorus Gecko Diet)
8. Fruit Flies(for the baby/young geckos)
9. Repashy Calcium Plus(for insect dusting)
10. And as soon as it arrives I am going to try the Clarks Gecko Diet
Diet
11. And as soon as I can get them breeding I will start using dubia roaches as well!
The Repashy Gecko MRPs are supposed to be able to be used as a sole diet for the gecko and I don't doubt that they would work, but it is good for variety and exercise(enrichment) to give other things like live bugs.
As far as commercial breeders goes, I don't know for sure what they do but it seems like the people that are very seriously into Phelsuma do the variety over just trying to grow the geckos quickly. I personally have noticed that my baby geckos grow much faster once I switch them from fruit flies to crickets. It is an amazing difference. That being said, I firmly believe in feeding live bugs and the other diets so you can avoid deficiencies.
Another quick thought on the whole what you feed your gecko deal-If you raise up a gecko on only one type of food and then one day you can no longer get that food, what is your gecko going to do? Some animals will get set in their ways and when you switch their foods they won't try them. If you always use a variety the gecko will learn to eat different things, so if the company(like Repashy) ever stopped making the product it is no big deal