A guy from my town was on the Traitors and did attempt to take advantage of the loophole you mentioned and they almost entirely edited him out of the series.
My spouse and I are avid consumers of the series and we have been hypothesizing on and off why 1-2 game participants each season get almost no screen time whatsoever. Originally we thought it might simply be that the people in question make boring television. This is another possibility we had not even entertained - that the producers were punishing people for meta-gaming.
Based on my knowledge of the show and commentary around its filming, it does seem genuinely mostly unscripted - which means that producers are probably reaching for other mechanisms to control dialogue and contestant behavior and probably threatening screen time for breaking the 4th wall is an effective one.
Based on my knowledge of the show and commentary around its filming, it does seem genuinely mostly unscripted - which means that producers are probably reaching for other mechanisms to control dialogue and contestant behavior and probably threatening screen time for breaking the 4th wall is an effective one.