Speaking as an introverted engineer myself, the number one turn-off on any given product is a lack of transparent pricing info or locking any sort of demonstration behind a mandatory contact harvester for a call or email chain. I don’t want to commit to a bunch of social “dances” when I’m trying to solve a technical problem, nor do I want to deal with overly pushy salespeople who either don’t understand my problem or immediately want to upsell to meet their own goals or quotas.
If your tool solves my problem, I will pay you money. That’s the transaction. Everything else - the swag, the sales calls, the free lunches, the conference tickets, the sportsball box seats - is extraneous to my core goal, which is solving the problem.