If there is a 30-day period at any point in 2025 where more than half of the markets created on Polymarket use a resolution method that is not UMA then this market will resolve to YES.

If a market uses a combination of UMA and some other system, the market will still be considered a UMA market unless UMA is a backup option that most of the time should not influence the resolution decision in any way. If UMA is a backup option as described then that market will count towards being a "non-UMA" market.

The 30-day period must have at least 20 new markets created for it to be eligible.

After the closing date at the end of the year 2025, if there have been no eligible 30-day periods that meet the criteria this will resolve to NO.

Polymarket retroactively changing the resolution method of markets to not use UMA will not affect the resolution of this market. Only resolution mechanisms on market creation by Polymarket will be considered.

If they get acquired and their markets are published on a new website then these markets will not count. If Polymarket.com auto-redirects to the new website this still won't count.

If Polymarket rebrands as a company decision and not due to an acquisition and change their website URL then new markets made would still count.

If a new version of UMA is created that has a different name eg. UMA 2.0, then this would be considered a non-UMA market. Updates to UMA which are still considered as the original UMA will still count as UMA markets. If UMA rebrands and changes its name without making other major updates then these will still count as UMA markets.