They could be worth it. If 1 in 10 of those voters directly becomes a customer (or mentions it to someone else who does), and the LTV of a customer is > $1k (which is very possible for a b2b relationship), then it is. And that doesn't factor in any customers (or investors) bought in by having greater visibility on the post (more votes = more time on front page = more people see it = probably a few more customers).