Ironic that I get more money than an educator ? Yes it is in a way. But it is the world we are living, no ? (and we should not start to talk about bankers) On the other hand, there is no comparison between a software developer and a educator (I teach nothing except to my kids)

Can you explain?

An average teacher posting about what they earned teaching children would be boring; "my salary last year was $X; this year it's up 2%".

This is interesting because making educational apps is far riskier than applying for a salaried job as a teacher -- you might make a grand total of $0 or only slightly more after many months of work.

Maybe you're saying that any educational software should be permanently priced as cheap as the developer can afford, to reach the maximum number of kids?

That's not obviously the best approach, though, even if we assumed that every developer choosing this market would be so philanthropic as to forgo all profit; that would also force them to all remain tiny one-developer shops with minimal support, etc.. Is that necessarily a good thing?

Also, publicizing moderate success in a risky endeavor (apps in the education market) is a good thing for the market as a whole -- anyone who reads Pierre's post and realizes "hey, if I do right, maybe I can actually make a decent living doing that" will mean more good apps for students.

Well, he is a developer who writes educational software and he is explaining how he did what he did for the educational market. I think in a market context the numbers make sense and help both shed light on an opaque market and to give tips to those trying to break in.

Actually educators have salaries, the author of the post tries to automate and gamify some aspects of education, and posts report on how successful it is.