What's stopping Instapaper selling you as well as getting you to pay for it?

Because he has something to lose if he does - customers who pay him money.

But unfortunatly there are no good Instapaper client for android.

Papermill? http://www.theverge.com/2012/3/23/2897938/papermill-is-the-f...

I have tried papermill. Its the most unstable app I have ever downloaded for my android phone.

It crashes randomly but most often when syncing or reading a article. I have send bug reports and contacted the author but that hasn't really helped.

Try InstaFetch.. There's a Free and Paid version.. Works quite well for me.. But using RIL or Pocket more..

Ipaper is ok. I just wish it remembered your position within an article.