When making offerings to a spirit or spirits, it doesn’t matter what you offer more or less, regardless of the expense in doing so, so ridiculously expensive offerings aren’t necessary- it’s great when done, but not mandatory in this whole topic.

The whole point in making offerings primarily is payment for services rendered; let me explain how this whole process works & what the point in doing so is. By the way, a client once asked me this..”What’s the point in offering food to a spirit?”

Spirits draw the astral energy from said offerings and can’t just take what they want, regardless of what that is. They can’t just say “Hey, I’m going to draw the energy from -or take that boulder over there”.
It doesn’t work that way; they can’t just take what they want for the same reason you don’t just jump over someone’s fence and take their flowers on the lawn. The universe is subject to rules in this aspect too, and doing so would violate said rules. But when said boulder is offered to a spirit by me, as a mage…that’s different entirely. That is a gift from me to Him/ Her/ It. The concept of giving someone a gift applies here, as it’s about the thought and input behind the gift, it having meaning to the person.

See here too, for another article on offerings as well as a list.