For example, scientific instruments companies also sponsor technical innovation, they also have scientists in marketing / education roles going to conferences, etc. If you are selling NMR instruments for 10 M$ each, you also invest in good relations with the community, because you want the person who has just received a massive grant to think of you and your great work and call your sales dept. You aren't going to get anywhere cold-calling random academics who mostly aren't in the market for a NMR right now.