There was another seemingly popular paid ringtone app at the time, but I can't recall what it was. And a search now for 'android ringtone app' now brings up lists of 'Top X ringtone apps of 2018/2019' populated exclusively by free apps.
Such an idea can be done on Android, but would have been impossible on iOS (at the time, have not looked into it since).
It was mildly popular for download on the store, but supporting issues on various phones was a hassle, and Android update occasionally changed the required APIs. Currently the project is broken and on the back-burner to get it fixed again. However, it is freely available if you want a look.
Alternatively, I've been just doing browser based dev. The free GCP google cloud shell lets me edit and host so long as I have a connection. If I wanted I could still keep it in sync with git running under termux.
As Admiral's blog post points out, Github recommends using the same contact procedure for anti-circumvention takedown requests as for normal DMCA takedowns. But as far as I can tell, they're doing so purely on their own initiative; such a takedown request doesn't have the force of law in the same sense that a claim of copyright infringement does.
I made this mistake to, Admiral's blog post does imply it. However, they were making a DMCA take down request, based off the reasoning it was for anti-circumvention.
They even clearly state they used the only tool available to them, DCMA. From all the current summaries on this, DMCA does not apply to a line entry in easylist. A domain can be trademarked.
This should be added back in. And if github cannot standup to DMCA abuse, then well, easylist and all other developers should be giving a clear hard though to their continued use of the github platform.
Edit: it looks like EFF has gotten in touch with easylist. Good. https://torrentfreak.com/dmca-used-to-remove-ad-server-url-f...
Admiral seems to be a paywall server basically. If blocking their domain gave access to paywalled content, then the DMCA seems to apply http://www.dmlp.org/legal-guide/circumventing-copyright-cont...
However, that defense is a bit flimsy to me since the fall back to having the paywall blocked could/should be a "Paywall blocked, please disable your addblocker to gain access to our content" msg.
Anyhow, that is immaterial because so long as they don't actually serve adds, Easylist could/would have removed the line no problem. Admiral should have just said "Our domain doesn't serve adds, we work on paid content access" and they would have been removed without all this hassle.
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I'm not surprised by the study. My 2.5 year old would much rather watch something if the tablet is available than read. Even the interactive and pictures + audio books aren't much competition.