nope. it does really matter. it cancels out. The games don't come onto the services till sales have all but dried up completely.
Imagine 20M ppl spend $50/yr on PS+. That's $1B right there. Now if Sony decided to give a pub $5M for having their game be in PS+ and does that for 24 games a year thats just $120M. And this is only for games that arent published by Sony.
The pubs will be happy cause not only do they get $5M that they would have not got, but they also get free exposure for their game or other games from their company. Win win.