Howdy! Well it took many months for me to start my 2nd thread - and so here it is. Thanks to Gary's fabulous web site:
Free Frequent Flier Miles I/He discovered that Delta AMEX is having a 20% bonus period from March through April here:
Delta Amex Bonus Period.
That's it. My 2nd Thread. probably redundant, too. Oh well. Enjoy!! Thanks for all the great info, too.