As far as I know Anti-Seize is not a great lubricant for these types of applications. It has some lubricating properties but is better used on fasteners or when joining parts. It provides even torquing, prevention of galling, easier release of parts and so on. Grease or oils are used when you want to lubricate something that is sliding or rolling.
Additionally I believe that some grades of Anti-Seize could wear out your bushing over time as it usually contains particles. If these practicals are harder than the bushing they will act abrasively.
That being said I have no idea what grade or type of Anti-Seize this is so it could be working great for you, but if people want to try this they should be aware of that some grades might not be the best idea.