Why soy dominates
Soy wax (typically Golden Brands 464 or NatureWax C-3) costs $3.50-4.50 per pound in 10-pound bags. It pours at 135-150°F, sets clear of glass, accepts 8-10% fragrance load reliably, and burns clean. Customers perceive "soy" as natural and clean-burning even though the difference vs paraffin is overstated.
What soy gets you: easy manufacturing, accepted positioning, predictable burn, simple wicking. What it costs you: lower hot throw than paraffin, frost on jar walls, the "soy bloom" some customers find off-putting. None of these are dealbreakers if you know the workarounds.
