If you want to offer something unusual, consider making them some original art and releasing it on a “public domain” CC0 license online so other people can re-use it in perpetuity, or doing them a “Files” thread that compiles your experiences with them, and maybe their sigil, correspondences, and so on, here and/or other forums where they may be of use, the time and promotion of their name is a fitting exchange of energy in many cases.
This is the thread I have done and maintain for Belial, for example:
These are two threads of thanks being given to spirits and acknowledgement for work successfully accomplished:
Also, post below with any unusual ways you can think of for people, especially those new to magick or with limited resources, to thank the spirits who aid them?
