Two Livable plugins are free downloads. Three specialist tools are paid once. See what each one does, what it costs and when free is enough.
No. The free plugins are full plugins, not limited trials. You download each one with your name and email and accept the download terms. Nothing expires and there is no licence to buy.
Most businesses do not. Each paid tool is for one specific problem, bought when that problem happens. If your site is healthy and your search traffic is steady, the free plugins are the whole kit.