Some posts on the front page are allot of contests, but yes, allot of unrelated stuff. We have tried fighting the battle, and go through and try to filter unrelated content, but it is a losing battle.
That being said, more people posting more relatable things will help solve that issue, lol. It will put more good content up front and center.
There is allot of community tag abuse overall in all communities. Hivelist is no exception. You can tell when it is tag abuse because it will generally just have the Hivelist tag.