Yeah, if you make really good friends with your LDS who services your brand, you can probably get them to pick you up a "free" service kit now, but defer the actual service until the reg actually needs servicing. At the rate you are (almost not) diving, that may be several or even many years. This could get you at least one more "free" kit but still save you the cost of the unnecessary servicings until one actually becomes necessary.
BTW, my experience has been (across several makes and models) that even under fairly heavy diving I have hardly ever needed to have any regs serviced. For example, I have 4 sets of Poseidon Jetstreams that I bought used in the early 2000s (probably between 2002 and 2005). Once I got to 4 sets, I figured I could get one set serviced each year on a 4 year rotating basis and this would leave me with 2 sets to use on my doubles and a spare set in case anything broke before its year for servicing rolled around. As it turns out, even that has not been necessary. It's been 7 or more years since any of them have been rebuilt and the latest plan is I will only service one when it starts to fail and just use 2 of the other 3 until it comes back. Another example, I have 3 Dive Rite second stages and 4 Hog second stages that I use as sidemount and/or stage regs with assorted first stages of various manufacture. None of them has needed service more than once in the 10 to 15 years I've had them, so I literally save enough money on not paying for unneeded servicing to cover the price of buying another reg every couple years.