Yes, Adobe have strict rules for model release and intellectual property release. You need to read the rules in full before you send your first file. Sorry I have no idea what you mean by "i haven't got any downloads or whatsoever you call them yet.".
I also have no idea what you mean by "So if nothing works than how are you going to get the royalty?" Adobe are getting about 100,000 new stock images every day.
If I have not answered your question, please read Adobe's rules and let us know what is still unclear.