I work with someone who has gotten me thinking a lot more about what software I do and don't pay for. He pays for any software he uses "daily". The payments are either donations to open source projects, service fees, or software purchases.
Although this would not be much of a change for Sublime in particular, which is commercial with purchase optional (just occasional nagging.)
Oh and also replying to the guy above. Tell that to dozens of OSS tools that had to be supported by real companies because people were not that willing to donate. Look at grsecurity for example, tmux, and the other ones i do not remember that Stripe donated 100k to.
Which gives you the incentive to make the software less user friendly so more people pay for support :)