No, no payment, bank account or credit card is required to register. After registering automatically you will get the community edition completely free.
The community edition is not a trial period, it is another edition, aimed at introducing basic security in the software. This edition has no cost, no time or use limits.
So is. In the price comparison table there are two buttons, one that indicates that you are consulting the prices for monthly billing and another for annual, you can compare them to see the differences and the savings you get in each of the editions. For example, if you subscribe to the Enterprise plan annually, we give you two completely free months.