hi
I mentioned similar in point 1 of my first post. That is in part what writers who aren't performers do anyway. A band records a song, sticks it on album, maybe a single. They then control that version of the song. The songwriter continues to get paid via royalties and further licensing etc
There may be a number of variations in the deal. That is where negotiation comes in.
Beginner songwriters often give away more than they perhaps should just to get their foot in the door, even to the point of giving a Songwriting credit relating to a one word or note change by the artist or allowing use of the song for free.
It's up to you what or how much you trade during negotiations. The fact is, the bigger the artist is the more you might expect to give away in order to get started in the biz.
It should be highlighted not all writers are prepared to negotiate on such fundamentals. Then again having rhianna record your song and taking it to a global market could radically alter the course of your music career.
As ever the pros and cons are weighed up by the individual and hopefully a good balance is struck.