Ok, there seems to be a common confusion going on here that's raising anxiety levels.
While they are related, "Opt-In" and "Marked as Racing" are two separate things.
- "Opt-In" is a user setting that is actually called "Take Part in Seasonal Regatta" (emphasis mine)
- The current value of that setting takes effect just prior to the start of a regular seasonal regatta (we can argue about if there is an exact time or if your team has to take a task first or whenever)
- When it "takes effect" we see the result as a little "ship's steering wheel" in the co-op member list meaning they are "marked as racing this week".
- The "Opt-In" setting can be changed as many times are the user wishes but once the race starts and you are "Marked as Racing" any change does not take effect until the next seasonal regatta.
- "Restrict from Regatta" affects that user setting and it must be changed back to "Opt-In" by the user themselves (we can argue about whether the restriction makes you skip at least one whole race or not)
- "Opt-In" has absolutely no effect during Interseasonal week. Everybody is listed as "Racing" for that relaxing / no pressure week. A players setting of "Opt-In" has not been changed for Interseasonal week and whatever it's set to will be what is used for the next seasonal regatta unless changed by the user (or they become restricted).
- What the value of "Opt-In" is set to when a player joins a new co-op is up for debate. It used to be that people had to make sure they were "Opted-In" after joining but some folks have claimed that this has been changed now.
- Whether "Restrict" applies to interseasonal week is also up for debate.
Sorry for the professorial tone but I see folks getting worried or upset about looking at the "Marked as Racing" and thinking that it means "Opted-In" and especially during Interseasonal Week which is the one time that the two concepts are not connected.