I recently wrote about the 30% bonus on transfers from American Express Membership Rewards to Delta Skymiles and the 50% transfer bonus that folks are eligible for if they’ve never made a transfer before. Both offers require registration.

MilesQuest reports that the bonuses are stackable. If you register for both of them, and you’ve never transferred from American Express Membership Rewards to your Delta account before, you’ll earn an 80% bonus (through March 31). Plus if you transfer 50,000 points or more from American Express, you’ll earn 25,000 elite qualifying miles.

Now, if it’s me I’m probably not making the transfer for an 80% bonus (which I wouldn’t be eligible for anyway, because I have made some small transfers in the past). But it’s a lot more tempting than the usual offers, for sure.