Limits apply. 25,000 for your application, 1,000 per user, as Mano Marks said. But if I stand you right, do you just want to link the card? Why don't you just use the standard google maps link? Then you would not have any restrictions.
And yet, if you just refer to the staticmaps call (for example, this example ), your application has nothing to do with the staticmap call - it's the users decision to open it. I think there will be no restrictions for this. (But maybe they MUST track the referrer and apply a limit to your page.)
calimarkus
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