I feel like some users do this sort of thing around leagues seasons cutoff time (midnight PT or 3 am in my timezone), perhaps not as visibly or deliberately. So I decided to try to raise awareness about it by making it obvious and very visible, including by creating this market.

I've artificially manufactured almost M100k in fake leagues profits for this Season 30 (Oct 2025). These are not real profits, I've not gained a single mana through these trades. By trading against my own (no alts, just my own account) limit orders (big and badly priced) placed shortly before the season cutoff, the profit gets recorded in the new season, while the loss is carried by my old self at the time of the limit placement a few seconds before the season had started, although due to the overlapping period the closing season had not yet ended, thus the gains fully offset the limit order losses and there's zero impact in the closing season.

I don't see any rule or prohibition in the guidelines against this, except possibly the vague "loophole" one:

Users don’t maliciously take advantage of ambiguity, loopholes, and technicalities, to benefit themselves.

The only "benefit" is the new season profits/placement. There's no real mana gains, no infinite exploit, only the league profits fake figure which is already its own "delusional" thing quite divergent from real profits due to arbitrary rules for what counts or not for a particular season.

The execution is quite simple, here made big and blunt by fully swinging a small market, but could easily be done more subtly by spreading it over several markets without swinging them as much to avoid detection. It does involve some risk, as any trader could catch me within that midnight minute and steal the badly priced limit order, saddling me with the big loss. In case of several markets the risk would be minimized by having a bot or script execute all the trades within a few seconds around midnight.

All this to say, I don't think it's a huge issue if people do it a little, just not as extreme as I've done here. Where to draw the line, and how to detect and prevent abuse of it, are interesting considerations to keep the leagues games fun and fair.

Anyway, feel free to add more answers. I might bet on these since there's not much subjectivity. Apologies to fellow Masters for any rank disruption this may cause. I do hope my fake profits get reversed. Any comments or suggestions are appreciated, particularly from @mods or admins.