It's not just online recipes, but cookbooks written for the Better Home & Gardens crowd. The ones who write "curry powder" (and mean the yellow McCormick stuff which is so bland as to have almost no flavour) or call for one clove of garlic in their recipe.

I joke with folks that my assumption with "one clove of garlic" is that they really mean "one head of garlic" if you want any flavour. (And if the recipe title has "garlic" in it and you are using one clove, you’re lying.)