Cloudify.ro implements the hourly payment. There is no minimum contractual period, a product can be used even for short periods of time (1 hour, 1 day, etc.), except for software licenses.
Floating IP addresses are just publicly routable IPs and can be allocate to instances, thus making them reachable from the outside world.
One of the main advantages of floating IPs is their flexibility – the free and needs-oriented assignability. Floating IPs are therefore suitable for use in both failover and switchover environments – for example, for performing upgrades of applications or entire sites with minimal downtime.