My Growing Secrets:

1. 8 bikes, the tire lasts over a year, but is ridden enough to be tubeless
2. scuff up the sidewalls in the McDs to allow constant permeation of dry air
3. cheap homebrew, mixed by the quart, in place of $65 tires
4. feed creature beyond the point of exponential growth, see #3 above

I finally changed the tire when I felt two distinct metastatic lumps. She was extracted having freshly consumed the better part of 2oz of new sealant.

and here she is, mounted on my wall!