I'm personally a hard copyleft developer, so I'd prefer that people making apps and tools for the lemmy eco-system, open source them, to benefit the community as a whole. Nearly all lemmy projects have adopted that standard, and are using the GPL and other hard copy-left licenses, and sharing their code freely with the community.

One example: various devs of lemmy apps have asked me how we build comment trees. Because lemmy's source code is open, I was able to share the exact code from lemmy-ui (typescript) and jerboa (kotlin). This is not something closed source developers are able / willing to share.

So I continue to recommend that developers heed calls to open source their applications. I developed my ThumbKey android keyboard, specifically because my requests to the MessageEase developers to open-source their codebase, after development had stopped, went unheeded for years.

Side note, but I've seen a lot of the discourse around Sync confuse FOSS, with making money. Of course developers deserve to get paid for their labor time! The thing is, FOSS makes no demands on how you monetize your software: "free as in freedom, not free as in beer", is the saying. So its entirely possible to open source your app, and still charge for it if you like. And If someone wants your app for free (say via an unlocked APK), they'll get it, whether its closed source, or not.

And yes, if an instance decided to insert ads, or becomes full of blog/cryptospam, I'd def recommend other instances defederate from them. I'd rather not lemmy become the ad-machine that other social media has become.