For those that were buying the packs at 15m and selling them for 24m, it is not taking money from the less fortunate. It's reducing the inf sink which you could argue causes inflation due to the amount of inf in circulation. However the market has a built in inf sink tax of 10%. If a person sells a pack in February for 24m, they are stopping the game devs from removing 25m from circulation. It's player profiting off the devs not "haves" profiting off of "have nots".
(There certainly are predatory aspects of the market, buying up something that is a scarcity and shifting the market to a higher price, this however is not one of those things)
Those that buy up the packs, open, and then sell the IOs in February, are adding just as much value as you are in converting IOs. All you're doing is increasing the supply and lowering the market equilibrium which is a benefit to the "have nots".
Example Person:
Let's say Paper Towel Pete has accrued a decent stockpile of Inf and hasn't farmed for Inf in 3 years. Each year Pete buys 666 winter packs for 15m (or 10m the first year), then sells them for 24m (pays 2.4m in tax) and makes a profit of 4.2b and saved the buyers 666m in comparison from buying it from the game itself. Pete then holds events throughout the year giving away 4.2b in prizes to the community without having to sacrifice time from his real life in order to obtain that prize pool.
Personally I'd say that Pete is adding quite a bit to the community, I'd even say he's adding more than someone that's just crafting and converting.
Pretty short sited to just vilify all pack flippers simply because there are some people that use their wealth to drive prices up.