Honestly, I'd rather buy a fancy foil Mark. Not a Mark card, but just have it so that my base Mark looks fancy. I feel this better encourages donating as it is /always/ visible when playing. You would also want to donate up to 12 times if you wanted to collect all 12 fancy foil Marks. If you stack a Mark card onto the fancy foil Mark, the fancy foil art still shows. Etc. I would love to see vrt express each Element in the form of beautiful artwork. But, maybe that's just me.
That said, I did donate to get a foil Chimera and I love it.