I have done the same, but with exception of being a paying customer for Play Movies and Play Music. I also buy extra GDrive storage, and use it for encrypted backups of my laptop (I have backup scripts that ZIP up my writing and work projects, GPG encrypt them, and I manually transfer the files to GDrive.

Google does derive real revenue from me, but not so much via their advertising business.

Edit: FastMail is a very good email service, BTW.