[blowski]

Define "contribute".

If you mean "write code for", then honestly I make very few code contributions. In the 00s, my employer was suspicious of developers contributing to open source, to the point of banning it contractually. I've since changed employer, but I have a legacy of that early experience.

On the other hand, I contribute to open source projects in many ways - I give money to many projects I use, attend meetups, give presentations at conferences, coach people, write answers on StackOverflow.

[egze]

For me all of that counts. Even a bug report is a contribution.

[AstralStorm]

Especially a well written and researched bug report. Many typical users lack the skill to do that, and a software developer would have an ample amount of it.