Seriously, It will depend on the type of product you are realising. My experience is PH have built an experience that forces sign up; therefore, if you don’t have an account, your can’t upVote; consequently, you will only reach those with an account to your point. I prefer Niche slack/ discord communities where you may know a leader, i.e. for products leaders; I’ve asked a Fiver freelancer to build a list of all slack communities that fit my product. Without spamming, you will find the connectors and making a list of those may be a better route to distribute your product.