Hello! Question for the experts!!

I have an American Express Delta Skymiles card ($95 Annual fee after Year 1) and was thinking of cancelling it.

Question #1: If I reapply, will they offer the miles incentive and if so, how long do I have to wait to reapply??

Question #2: Delta is the only airline which flies from my home town. Is there any suggestions out there regarding receiving free frequent flier miles or better credit cards out there for Delta Airlines?

If this is confusing, I am sorry......if further info is needed to make an intelligent reply, please let me know.

Thank you.