You are referencing to this clause in the EULA:
You agree that you won’t ask others to build apps from your projects when you have not purchased the appropriate Xojo License Key(s). You also agree not to build apps from the projects of others so that they may avoid purchasing a Xojo License Key(s).
Well this does not apply for the case, when I sell my license to somebody else, who then compiles it and after compilation sells it back to me. Here in Europe Software licenses are tradable goods. They are allowed to be (re-)sold like other goods like cars, furnitures etc. even when an EULA says something else. No EULA is above the law so this rule would be declared invalid leaving the rest of the EULA intact.Microsoft fought the case all the way to the European Court of Justice decades ago and lost.
There are a lot of players in this “after-sale” resale market like https://www.usedsoft.com/
If Xojo would not be such a niche, I would make up a webservice, where I would temporary sell my Xojo License for the compilation process to somebody else and after this he would sell it back to me. Of course everything documented properly though for this I would need to buy one, what never ever will happen.
My middlefinger to companies with such f*cking EULAs!
Use free and open source software!