PHP-FIG aims at bringing PHP-related projects together by standardizing and recommending the best coding practices in order to develop frameworks, packages, tools, community libraries, applications, and much more.
PHP-FIG is most popular for PHP Standards Recommendations, which are also known as PSRs. The recommendations help PHP developers to develop consistent code in various frameworks and tools.
For the typical visitor, the answer would be no — PHP-FIG is not a shopping site and doesn't sell typical consumer goods. There are no any coupon codes, discounts or paid membership options.
Usually, yes — the documentation of PHP-FIG standards and guidelines can be viewed for free. Developers can use the recommendations to structure their projects, write more consistent code, create logging system, use auto-loading, HTTP message handling, and others.
Using the common standards would reduce the time spent on the maintenance, reduce the conflicts between libraries, and help to integrate libraries easily. So it will help to save money indirectly.
Another useful point is that PHP framework developers, package maintainers, backend engineers and team working on Composer-based projects may find the PHP-FIG standards useful. Also beginners can read the standards when they learn the basics of PHP development.
Not usually, the standards are just recommendations and many of the projects that use PHP do follow the recommendations as it makes the collaboration easier, but every project can define its own approach.
In practice, PHP-FIG is a standards group so it doesn't provide software download, though many PHP libraries are developed according to the standards provided by the organization.
The useful detail is that PHP-FIG is a standards community so the support would depend on the organization's structure and community channels. Companies that rely on PHP standards can also support the ecosystem by providing contribution to the related open source projects.