This is why you don't post on ProductHunt. Your target market isn't there. Its nothing more than an ego trip for so many founders.
Posting a project to ProductHunt is unlikely to get it in front of your target demographic, but that doesn't mean it's worthless. People will download your app and if all goes well some of those people will leave you a positive review.
That matters for ranking, which gets your app in front of people. If you get some good reviews, that matters for conversion because it lends some social credit.
Is there any data on this? I'd be interested to see what % of real users they have.
Many times I've visited ProductHunt there's a top 4 app that doesn't seem useful at all that has tons of generic comments like "Great work!", "Can't wait to see what you do next!", "So useful!" (common on Twitter too).
Guessing you could get bots to vote + comment occasionally to build up their reputation and then use or sell your bot army to manipulate the votes for specific product launches later?
Another thing that's interesting is after you post on Product Hunt, you may get emails from third parties offering services to boost your upvotes.
So I guess if you want to reach a techie audience, it's not a bad place to get the word out.
Edit: the website is https://Nuftu.com, you can find it on producthunt by searching for the name