I've never waited for my credit card bill to arrive to pay. I just estimate how much I spend and pay a bit more within a week of the expenditure to avoid getting hit with the interests.
I did a quick search and it seems like there's nothing wrong with over paying a little bit but then I thought what if you take it to the extreme? such as transferring to large amount onto your credit card to buy something a lot more than your credit limit?
Are there any consequences in doing that? such as "you'll only earn points if you use the bank's money"?
You can bring your credit card in credit to spend over your limit. I.e. you have $1000 credit or a $3000 limit cc, you can spend on a item worth $4000