Open source is not the same as, "you are barred from commercial use," which is why I hesitate with OnShape. At minimum, these companies need to tighten up their licensing terms to be strict but fair.

to wit, Creators have this:

Trial or Free Versions. Trial and free versions of the Service are made available by Onshape. Trial versions of the Service are intended for evaluation purposes, and may be used for commercial or non-commercial purposes during the evaluation period. Free versions of the Service are intended to support (a) creating and editing intellectual property for non-commercial purposes, and (b) viewing, commenting and import/export for commercial or non-commercial purposes (to the extent the plan offers those features). If you intend to use the Service outside a trial context to create and/or edit intellectual property for commercial purposes (including but not limited to developing designs that are intended to be commercialized and/or used in support of a commercial business), then you agree to upgrade to a paid subscription to the Service. Trial and free versions of the Service are otherwise subject to the terms of this Agreement.

but consumers have this:

For any Public Document owned by a Free Plan User created on or after August 7, 2018, or any Public Document created prior to that date without a LICENSE tab, Customer grants a worldwide, royaltyfree and non-exclusive license to any End User or third party accessing the Public Document to use the intellectual property contained in Customer’s Public Document without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Document, and to permit persons to whom the Document is made available to do the same.

Maybe there's some nuance I'm missing, but on its face that's total bullshit. You can use the trial version for commercial purposes as long as you don't intend to KEEP doing so, but not the free version. Meanwhile, you are automagically granting a license to commercialize your files for literally everybody else. Sloppy at best, exploitative at worst.