The newest offer would require the Dolans to pay an additional $6.8 billion to buy out the 228 million public shares.
Other offers require more cash and foresight - purchases 14 days or 21 days in advance are common.
The two-for-one offer requires an adult and a child to fly on the same flight for the price of one ticket.
Legitimate guaranteed offers of credit don't require payments up front.
But he left open the possibility a higher offer might require a fairness opinion, which may be one reason Universal got one.
There are similar reductions on other routes, but the double-miles offer does require registration by telephone.
The original offer required about $800 million in junk bonds.
This offer requires 24 hours notice to cancel, and there is a four-night maximum stay; (800) 759-7550 or www.stregis.com.
And while hostile offers perhaps require greater gumption, if the last month is any indication there seems to be a flood of that.
The airline's offer before the strike would have required mechanics, cleaners and other employees to take a 26 percent pay cut.