Fast is a Netflix product so the fact that you've even heard of it is in direct relation to the weight of the brand that launched it.

speedtest.net has been the first search result on Google for "speed test" for decades. Partly the boost of domain SEO and partly the boost of it being an effective exit node for searches for that term for that long.

(Nobody searches "ookla" and nobody is going to search your tier-3 .com)