Just because Glitch joined CWA instead of forming their own union does not erase the fact that they are a tech company that became a union shop. And 2 is definitely more than 0, that's just simple arithmetic.
Finally, I never said "high-profile" had to mean FAANG. These two are high-profile cases that gets public attention- not necessarily because the media is manufacturing a narrative, but because Kickstarter, for its small size, is a household name. And Glitch is the successor of Fog Creek Software- this company, as well as Anil Dash and Joel Spolsky, are certainly high-profile names in the tech startup scene. We're not discussing some unknown boutique consultancy.