Freebies from SaltwaterAquarium.com

[vetteguy53081]

So I am starting to place more orders with SaltwaterAqiarium.com and I just realized that they have lists of free items that can be added to any order for spending certain amounts. I just ordered 6 month supply of trident reagent and got a free pint glass.
How long has this been a thing, and do any other vendors do something similar that isn't well known about? It's small free things like this that could sway my decision on where to buy an item if multiple sites all have the same prices.

This has been for years. I like them- Just wish fish were bigger than described