Yeah, looks like you had a little too much fun on that "drip" ;-)
You can edit your comments after the fact, but you cannot edit the subject line. I discovered that when I posted a subject containing the creative word "gallerly" which is now immortalized in the list of threads.
I did like your stories @kauai (although I am giving up on typing your entire user name - too many vowels!). Looking forward to some new ones once you recover.
Hi @KauaiHawaiiGuy, @dreamshark has answered the first two questions correctly. Participation Miles earned in the community are no different than the miles you would earn with your Arrival card. Let us know if you had any additional questions as they relate to miles. Thank you!