It is quite clear to me the response rate there has literally zero to do with people not wanting competition for rewards.
I was at 20+ hours of not sleeping when I was discussing this yesterday. I was delirious.
(Age 51, doing these long work sessions back-to-back over the past week or two, still fighting the remnants of auto-immune disease, etc)I agree there is no sign of conscious desire to want to avoid promoting signups to mitigate competition for rewards.
I later clarified (to which you even conceded the possibility) there may not be a strong incentive to promote external signups, especially given any risk/cost to doing so.
Now tie that in with a SUBconscious (hindbrain) disincentive to avoid promoting signups to mitigate competition for rewards.
smooth you may lack exposure to the field of psychology and the impact of the subconscious mind.
I am not qualifying the effect and ranking it as a priority concern. I am just an idea person. I like to add all the ideas to my set of concepts to consider before I distill.
When I am very sleepy and can't communicate nor think as clearly, this may get lost in the shuffle of crossed signals.