Some stats from https://www.surveysystem.com/sscalc.htm
Plugged in 800,000 as pop size, and 99% as confidence level and 4 as confidence interval.
The number it spits out is 1039
It is a pretty good sample size.
The issue here is whether we can draw a reasonable inference from that sample to the target population (all people in San Francisco). My guess is it does not. The title is not justified by the data presented.
The claims we're able to make are narrow:
A combination of annual secular growth, advertising spend, and COVID that we cannot disentangle suggests 30% increase in move requests to this moving site in the area; Separately, the sample of people using this website are more interested than outbound moves than last year.
If we want to combine these, we have "Website Shows 90% growth in raw outbound move searches among SF visitors"