Nop I haven't fished Glebe or Mallory that's correct!
Generally I tend to stay well away from them and only fish naturally stocked waters.
However, when I went through a phase of chasing big perch I
fished several around the NW, all had shops that sold bait at high prices. Not that I bought any bait, as my fishing was done with worm. And with a little bit of effort on a damp night those come free
One I fished was charging 2 1/2 time the price for a 1K bag of brown crumb with red dye in it my local tackleshop sells. The "catch" was, you couldn't use your own groundbait on his waters, you had to buy his if you wanted to fish with Gbait.
When I went in my local tackleshop I was talking to the owner about this fisheries rip off prices. The owner is a match angler who fishes Commercials and he told me the Gbait he sells is the same as the one the fishery sold and the fishery buys it through the same rep for the same company he did.