I just don't announce because People tend to copy it instead of working together.
It is like pinky and the Brain when pinky says something And Brain says afterwards "i had an idea" : )
If you are referring to E-Eon stealing your amiappstore idea, then i dont think so.
After all, I had idea for ami appstore already 2005, and that was based upon seeing wildgames wildcoins system, from which i thought my own version of it for Amiga (by other words, was copying the idea with own additions), which was more of a half way from wildgames system and todays appstores. However, since in these last 10 years i havent got any games released (which is bit embarassing), my plan never came to reality (or even got started rather). And after Apple and Android appstore came to be, im pretty sure theres couple of hundred more or less serious ideas about amiappstore existing in peoples heads.
So, no. I doubt they stole your idea. they just got it just like you did by seeing those other appstores.
But so far it seems your idea seems to be having more unique ideas, although i think it is also riskier in terms of succeeding. Amistore is somewhat safeplay. Nothing big, but quite sure bet.