Cron - How it works and Elysia Cron

Issue Summary

Wondering how the Amazon module works with cron.

When it updates its cache files do it run trough all ASINs in the database or just the once that were called upon view by a user/reader?

Is it possible to stop a "Amazon Cron run" if already has been initiated?

Also, if I set "Elysia Cron" to run it less often it is only the two "Amazon" items on the "Elysia Cron" settings page I need to set right?

The reason for my concerns is that I run a fairly big site with a lot of ASINs and I do not want to hit the hits per hour loft from Amazon Web Services because of cron runs that effect ASIN fields people don't see.

Thanks,