This year I made sure not to buy expansions for a lot of toons, only bought 12 expansions, well cause, frankly, I was just wasting money. Last year, I bought TBM gift codes at 2 Krono per account for 25ish accounts, the year before that I bought TDS for 9 accounts since I actually had to pay off Daybreak directly, the year before that I bought CotF for 36ish accounts and I played about 6-8 accounts (which was partly the reason why I didn't splurge on buying TDS for that many, and also the fact that expansion content has pretty much sucked as well as lacking over the last few years, wru tradeskills recipes).
I'm going to do the same this Fall on the next expansion, not going to buy more than 6 to12 and go from there, cause I don't end up playing that many or just flaking out of playing after a few months.
I am going to hold off on buying expansion so early too , until its verified that there is some non-Prestige gear like in EoK, if the non-prestige gear is not usable in the current content its meant for then I probably might even stick with just 6 accounts bought this Fall.