I quit smoking with Flings, loved 'em, still have a few. Without their "summer sale" they cost me about the same as cigs. Fortunately I now have a couple of e-Gos, a couple of G6s, juices, etc. I bought WC cartridges (5 for $10 plus shipping) in my favorite WC flavors. Then I discovered it's much cheaper to fill a Boge or SmokTech cartomizer (love the 1.7 oHm LRs) with similar flavors bought in bottles. "Cin" flavor (redhots) was easy to replace. I quickly found a couple chocolate mint fluids I prefer over Snap. I thought I liked WC Espresso until I tried a few fluids I like better. I tried to duplicate WC tobacco flavors until I found Halo's Tribecca, which is definitely not a match, but I prefer it over all of WC's. I'm still trying to match Zero-K. I can't decide what's in there besides peppermint and lots of "koolada", but there's something else... THAT is the only one I still have "Clear Draw" cartridges of. Eventually I'll match it, then I won't need $4 for a Fling or $2 for a cartridge - just 35-60 cents or less for a full cartomizer of my own, depending on the flavor and source.
I'll always be appreciative of WC, but I won't be customer any more unless they start selling fluid. I'd pay plenty for a jug of Zero K!