My initial launch on ProductHunt was total and utter crickets. Now we have ~500 customers, multiple $100K in ARR and two rounds of venture backing.

Without the humble brag, use a platform like PH as any marketing channel: email, blogs, Twitter etc. Never, EVER think a post on PH will be your defining marketing launch. Just like there is no magic one email, tweet or post that will define your product or make/break you. Expect nothing. The real work begins after launch.