With summer vacations just around the corner, millions of Americans are getting ready to cash in their hard-earned credit card rewards. But what if those rewards disappeared overnight?

10 valuable credit card welcome bonuses ending soon: For a limited-time earn $1,000+ in travel Several of these offers are the highest we've ever seen for that card.

Angel Zhong says before you commit to a credit card consider whether you can afford to repay it. (Supplied: Angel Zhong)If credit card point programs are a mystery to you, here's what you need to ...