It’s a trial of 6 months for Pro, then drops automatically to a 3 year free subscription of Bluelink Plus, after that, it drops to Bluelink Lite.
No idea why yours keeps popping up, unless you haven’t properly set it up yet.
Prior: SEAT Ateca Xcellence Lux 1.5 TSI DSG MY19, VW Golf GTE PHEV DSG MY23
Current: Hyundai Ioniq 6 Ultimate
Next: we'll see what's available in 2028.