Its more of GGG not regulating the RMT trade as much. You can take a peek at the RMT sites yourself, every league the sellers’ reviews are spammed full of feedback from PoE currency sales. You can definitely P2W there. But because how ‘power’ is calculated based on your builds/player reactions as well, it doesn’t show up as obviously as TOS.
Just because the RMTers are in the economy doesn’t mean that the prices are high because of them. The rarity is the factor. These items will be priced extremely high, to the point that only no-lifers and whales can afford them. Is that the whales fault? No. If you drop the whales, then they will still be priced where only the no-lifers can afford them. It is due to item RARITY. These items will NEVER be all inclusive. I do not see why you keep using them as an example beyond not understanding the scarcity value concept.
Also > He could’ve listed the item for much cheaper to be all inclusive… But if you had a Giltine’s Wing yourself, would you?
Would you list your Giltine’s Wing cheaper to be all inclusive?
Edit: @TheAlleyCats POE’s monetization is based on targeting a specific market segment. The prices of cosmetics there are aimed at (in comparison to TOS) ‘whales’. The player base has already been segmented into ‘haves’ and ‘have nots’, thus the high prices per-item. GGG stays out of the pay-to-win concept by not releasing any ‘power’ objects in the cosmetic store, but RMT is alive, and thriving there. Mainly through sales of the ingame currency.
Amusingly, the most prominent ‘bots’ in Path of Exile are the currency exchange bots.