Hi, a common scenario for ramping down a multi-variant test is to ramp down only one of the variants (say, ramping down treatment_2 from 33% to 0% in a control 34%/treatment_1 33%/treatment_2 33% setting). In our current abtest config, we can ramp down the treatment_2 to 0% and the remaining 67% of the traffic is still be in the experiment (i.e. 33% of the users will no longer be in the experiment, for those who were in treatment_2, they will experience the control but won't be registered to the control). This is the best practice IMO because it stops the damage caused by treatment_2 and doesn't reassign users in treatment_2 to control or treatment_1 to contaminate the buckets. However, it seems we can't make such
config change in the growthbook. Could you please suggest the recommendation for this scenario in growthbook? Thank you!