Ask HN: Product Hunt or Paid Ads?

I'm trying to determine the best channel for a soft launch, I've been working on https://luna.apolloapi.io - I'm currently on the fence with Product Hunt, a lot of outbound to date has been through LinkedIn so I'm wondering how I should quantify my approach here. For those who've done PH launches what are some early tips/tricks? For those running LinkedIn ads, anything useful I should know before diving in?