Desktop end user: I donated to Ubuntu, and to Debian via SPI, and a bit to OpenBSD when they had their funding wobble. Since 2015 I've been using Slackware and bought a DVD subscription (it turns out that the Slackware BDfL wasn't getting much of the income from the sale of the DVDs or merchandise so I donated again recently).

We are talking the price of a hipster coffee per fortnight here, but a few thousand people putting that on a recurring payment adds up.

For organisations like Docker I'm wondering if the RStudio model would be viable? The 'enterprise' subscription is something like $995 a year and can thus be budgeted for &c.

I sometimes do.

I also sometimes buy apps even if I'm not really sure I'll keep using them (sometimes just to encourage them to continue),

and keep subscribing to a newspaper even if I don't often read subscriber only content (since they sometimes have some great investigations && I want to support them but don't want to disable Adblock).

What I don't do:

- most monthly subscriptions that isn't payment for an actual service .