What were they tweeting exactly and why were they messaging people that voted for the product? We have seen founders reach out to people that upvoted on Twitter, thanking them for their support but that's different than what Austen described.
They tweeted at everyone that voted for us and said, "I see you voted for grasswire on PH. Check out our similar product." If you want, Ryan, email me and I'll send you details. Don't want to out anyone publicly.
I see. Now that you mention it, I do remember seeing that cross my "Product Hunt" search column on Twitter. That's not the first time someone has promoted their own product in that way but from my knowledge it's uncommon.