way down at the bottom here::

opt in polling from web based "interview". So, probably. nobody even remotely tech savy (aka has an ad blocker) ever participated. but anyhow... here's what pew research has to say about the effects of interview mode:

Where differences occurred, they were especially large on three broad types of questions: Items that asked the respondent to assess the quality of their family and social life produced differences of 18 and 14 percentage points, respectively, with those interviewed on the phone reporting higher levels of satisfaction than those who completed the survey on the Web.

Questions about societal discrimination against several different groups also produced large differences, with telephone respondents more apt than Web respondents to say that gays and lesbians, Hispanics and blacks face a lot of discrimination. However, there was no significant mode difference in responses to the question of whether women face a lot of discrimination.

Web respondents were far more likely than those interviewed on the phone to give various political figures a “very unfavorable” rating, a tendency that was concentrated among members of the opposite party of each figure rated.

Statistically significant mode effects also were observed on several other questions. Telephone respondents were more likely than those interviewed on the Web to say they often talked with their neighbors, to rate their communities as an “excellent” place to live and to rate their own health as “excellent.” Web respondents were more likely than phone respondents to report being unable to afford food or needed medical care at some point in the past twelve months.

ultimately, the legitimacy of the poll would depend on where they solicited their subjects in the poll. You're likely to get a far different answer with advertisements on Truth Social than you would with advertisements on, lets say, a palistinian-american subreddit. but that wasn't addressed in the report, so. we'll never really know.