It sounds like you are suggesting that regardless of the eco of your set up, you are still going to get ~90% return, is there data that supports this available?
Is there data to support that eco matters over 1M peds (eco vs uneco for same ped spent)? No.
What he really said however is that imk2 has a max tt of 1k ped.
You'd think so. But I've been talking to people who are profiting from just playing the game, and they aren't even using uber items, nor are they particularly skilled.
What I haven't figured out is if they're just riding waves of short-term luck or if they will be able to profit in the long run. That's more or less what made me start this thread.
Let's be sure we're talking same thing. If I understand correctly, you mean by "playing the game" = tt profit. It
might be possible that some player experience this all their ingame life (infact I have a friend who apparently has constant TT profit), but that's a result of statistic rather than strategy. Is relevant here the example of the old lady taking the jackpot in her first evening in a casino. While calculating all casino players and making an average, them all have to lose.
With a large enough population, you can meet
individual examples of most strange TT loot evolution along time, but in
average you'll end up at a small loss (90%ish income) forcing you to sell stuff for markup in order to reach/aspire to breakeven/profit. Because markup itself is the driving force behind deposits, ultimately, if you see the game as a giant circuit, like a spider web pushing all ways, all directions various transactions.
I'm sorry for using all these contextual explanations, but there is no straight general answer.
Is it possible that those friends of yours profit now continuous in tt terms, for real? Yes, likely. Is it possible they're just bragging? Yes, likely also. Is it possible such luck to last for years? Yes, but so unlikely that is exceptional. Is it possible for all active EU players to profit continuous in TT terms? No, impossible. Is any recipe behind such luck? Yes, if you ask somebody
actually being lucky, their method is THE recipe, even if it involves banging the head against the wall. Uberitems might be invoked as such recipe by somebody having such luck.
You must always reffer to reasonably measurable standards, and those are the tools' stats. You can say that imk2 magically brings good loot, but the buyer should actually believe in magic.