Looks like this may be a recent change after they were ordered to pay $150M for deceptive practices.
https://www.theverge.com/tech/894555/adobe-75-million-doj-se...
https://www.theverge.com/tech/894555/adobe-75-million-doj-se...
* Annual plan, paid monthly
* Annual plan, prepaid
* Monthly plan
And this is how I remember it back when, I signed up for a short gig where I only needed it for 3 months and went for the monthly plan, and then when the gig became a contract I switched to the annual paid monthly.
I think what changed is now the plans page says upfront "early termination fees apply" right next to the price.