You want proof of Alcor's good intentions, and you want it provided to you in a short and concise package. Well, that is impossible. If you really want to assure yourself that Alcor has good intentions, you need to devote some time to do some research. And lucky for you, cryonicists maintain an archive of all message posted to their mailing list. THis archive goes back about 15 years.
Here it is:
Just dive right in. Start at the beginning. THere are about 15 thousand messages there. Read through a good sampling of those 15K messages, and THEN come back and tell us about the motives of cryonicists.
We will be here when you get back.....