I'd also say that companies that do regular free feature updates get my money too: Valhalla, Overloud, Nomad Factory are three who give away significant updates to their products (and curated presets in the case of Overloud, some of which are half-useful :-)), so I go back to them to buy other things of theirs because I know (think) they'll continue to do so, so I like to support them and I feel I'm getting a good investment.