Adobe runs what must be one of the largest deceptive rebills. The vast majority of users signing up for a monthly plan do not realize that it is actually an "annual plan, billed monthly" and thus that if they cancel after one month (for example) they'll be billed for the remaining 11 immediately. I honestly don't know how they haven't faced FTC action for this, as it's been their primary model for 5-10 years now.
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