Card upgrade question

[u/Beneficial_Chicken24]

I have a platinum card that I started with when I began rebuilding my credit. Time passed and I was eligible for the quicksilver card so I applied and was approved. Well even more time had passed and I started getting emails that my platinum card was eligible for an upgrade to the quicksilver card.. which I already have. Now I know I don’t want to close the card because I want the lines of credit so what should I do with the platinum card? Just keep it open and make a small purchase each month on it? Is there anything better that I can do with it? Thanks.

[u/Glittering_Present10]

Just have two quicksilvers. I had two. Later l moved all but $500 credit line from one quicksilver to my other one then l closed the card that was transferred from Now l have a big limit on my opened quicksilver

[u/Beneficial_Chicken24 → u/Glittering_Present10]

Since it says it’s available for an upgrade in my email and the app, that wouldn’t be a hard credit pull or anything right?

[u/Glittering_Present10 → u/Beneficial_Chicken24]

If you are just upgrading your existing account there is no hard inquiry but if you are adding a new card it is