When clicking the 'Show me more topics' I expected to be able to see all the topics, but rather it's a random assortment with no way to change a URL to find one

When clicking the 'Show me more topics' I expected to be able to see all the topics, but rather it's a random assortment with no way to change a URL to find one. There really needs to be human-readable URLs at least for the categories. The front page could also use an example topic as part of the scrolling page to best illustrate a use case, as there are a vast number of other established sites and forums dedicated to such discussions. The small thumbnail mockup at the top doesn't highlight this enough I don't feel. If I were to imagine a use for the site personality it might be for off-shoot conversations around something specific that I could link others to, but that would depend on the ease of sign-up.