So if you let your game pass completely run out, and then you buy a bunch of live gold and then after adding the live gold to your account you buy a month of game pass, it might convert 1:1 again.
it is only gauranteed to work the very first time you do it, but many people online have had the 1:1 conversion work multiple times.
BUT even if it doesn't convert 1:1 you will not lose actual money. Because the other conversion (for example if you currently have game pass, and someone gives you a live gold gift card for your birthday) is a dollar-value based conversion. Something like "1 month of gold equals 3 weeks of game pass"... the conversion is listed on the game pass website)




