The $97 discount is only used for new sign-ups and DreamHost blocks Credit Cards and domains which have been used before to prevent existing customers from taking advantage of the discount. You may also consider some of the new promo codes with feature bonus (see below).
You might have read some reviews on the web about the CPU limit of 60 minutes imposed but DreamHost have removed the hard limit since then. DreamHost will only kill your process if your actions affect other users seriously. I rarely exceed 60 minutes per day and even if I do, DreamHost did not kill my process as it might not have affected the other users. Once, my process caused the server load to increase but DreamHost did not kill my process but instead, contact me and assist me to optimise my code. I heard from other customers that if your code can't be optimised further, they will move you to a server with less customer instead of removing your site due to the removal of CPU limit.
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