How many people can go in on one card.

I was not aware that a variety of individuals you know were able to enroll for one Costco card except your significant other.TheRealInternetMan😎

No limit

Depending on the type of membership there are set max numbers of cardholders. https://www.costco.com/costco-memberships.html

No nothing like that

I've taken 2 others in but at checkout 1 per card. If you want to use your money to buy there stuff u can.

I don't know what the limit for getting in, at check out only one person per card.