Good you say it out loud. That way you and others can be shown that this is a false assumption.

Ways to contribute but not limited to:

• Donate money so people can produce foss instead of for profit/proprietary crap
• Help translate
• write wikis or documentation
• follow discussions on the project forum/website
• spread articles/news about the project

Obviously, telling others about it is still helping and valid. But saying you cant contribute any other way seems unlikely.

Thanks for bringing it up.