Hello - I have a ink Unlimited card that i have had since 2018 (use it constantly), have not applied for any others but want to start doing so (from everything i have read safe bet is to apply every 6 months and you can open 2 of the same cards?). Should i leave this card open before applying for a 2nd one or close it?

I am not sure if there is such a thing as business history since it is not recommended to close long standing personal cards which could impact length of credit, not sure if it works the same on business side?

In my interpretation is the current offer for the Unlimited and Cash yield the same amount of UR points except unlimited you have to meet the spend in 3 months vs 6 for cash? thanks. .