You REALLY don't need to care about querying the whole population for these kinds of statistics. Steam has a MAU of at least 132,000,000 users. To randomly sample from just 17,000 users (0.0012% of the MAU) would provide a 99% confidence the sample is within +-0.5% the actual value. Given that you've personally been selected multiple months, they are almost certainly well and above a sampling rate worth worrying about.

The survey does have other statistical noises/biases/errors though - but none nearly as large as this "gap". E.g. internet cafe reuse of the same machines by different accounts means if you're hoping for a "hardware popularity survey" instead of a "hardware users use popularity survey" then the number won't always make sense.