well....does it say there's a limit?
terms and conditions:
2500 and 5000 bonus miles is valid until December 31, 2008 on a qualifying rental at participating Avis airport locations in the contiguous United States and Canada. Offer of 2500 bonus miles is valid on daily, weekly, weekend and monthly rates on all car groups with a 3 day length of rental. Please mention coupon MUAA078 to take advantage of this offer. Offer of 5000 bonus miles is valid on daily, weekly, weekend and monthly rates on all car groups with a 4 day minimum length of rental. Please mention coupon MUAA082 to take advantage of this offer. An advance 24-hour reservation is required. Offer may not be used with any other coupon, promotion or offer. The savings of up to 25% applies to Avis leisure weekly and weekend rates and is applicable only to the time and mileage charges of the rental. Taxes, concession recovery fees, vehicle license recovery fee, customer facility charges ($10/contract in CA) and fuel charges are extra. Optional items such as LDW ($35.99/day or less except in Louisiana $49.99/day) and other surcharges may apply and are extra. Offer may not be used in conjunction with any other AWD number, promotion or offer. Weekly rates require a minimum five day rental period. Offer is subject to vehicle availability at the time of rental and may not be available on some rates at some times, including some online rates at Avis.com. Car rental return restrictions may apply. Offer subject to change without notice. Holiday and other blackout periods may apply. Renter must meet Avis age, driver and credit requirements. Minimum rental age may vary by location. An additional daily surcharge may apply for renters under 25 years old. Frequent Flyer surcharge of up to U.S. $.50 per day may apply. Mileage accrual structure subject to change. Rental must begin by December 31, 2008.
Allow 4 to 6 weeks after qualification for bonus miles to be posted to your SkyMiles account. All SkyMiles rules apply. To review the rules, please visit delta.com/memberguide.