It is if you land people on it 
If it needs to be the homepage, it is also possible to have entirely custom homepages using the custom-homepage outlet in a theme: DEV: allow themes to render their own custom homepage by pmusaraj · Pull Request #26291 · discourse/discourse · GitHub… going this route you’d be able to build custom content based on whatever conditions you need. You could show different content using a query param like /?src=ad-campaign for example