There are several approaches:
Yes. Premier and Major W3C Supporters may have links to their sites from this page.
For one year from receipt of your contribution, renewable at the end of that year. See the the Supporters Program Policy for more information.
No, but you can renew as long as you would like.
W3C makes no assurances that sites linked from the Supporters program will see improved ranking in search engine results. W3C instructs search engines to ignore links from the Supporters page.
No. At the current time, we are not offering a link from the W3C Home Page as part of the Supporters program. W3C Members can participate in the Member Testimonials Program, which allows them to display a logo on the W3C Home Page and link from there to their own site; testimonials circulate on a frequent basis. More information about joining W3C is available.
No. The W3C staff does accept contributions of software licenses, but only for software that we plan to use. The valuation (and thus level of support) of any contribution of licenses is based on the actual number of licenses the W3C staff plans to use. Please note that we do not accept licenses for non-staff as part of this program.