I think the Key Fob replacement is a relatively new edition, too. My old plan, which covers brakes / pads / rotors / wipers (WEAR) as needed, does not include Key Fobs if I recall. Key Fobs aren't cheap either. Couple hundred bucks I believe if not more?Techs get paid on the hours the job is rated at generally, so where the parts come from doesn't really matter. Not sure that I understand the point of saving the money for all the time invested, and as mentioned, they aren't Volvo parts. I realize Volvo parts aren't magical, but if you make a mistake and get inferior products then you are out a pretty big expense if something happens.
The 10, 20, and 30k service are all included with a new vehicle purchase and do carry to the next owner as well, though they have to be used up in the first 3 years. Our current full prepaid maintenance out through 100k without wear protection is something like $2700. That does include the brake fluid at 40 and 80k and the spark plugs when due as well. It also includes a key being replaced once a year. So that isn't a per visit cost, but gives an idea of cost of ownership. That does not include tires or rotation though.