Get a link on a mainpage of PR 9 sites

This is the most useful SEO technique you probably do not know but I am going to share it. Spare some time, do a search for sites that have PR 9 and have a donation section in their mainpage. I am sure there are at least 20 such sites. In this donation section they post latest 20 or 30 donators. Do a donation for at least 1$ and you will see your site listed there. This is the cheapest way I think to have one way non-reciprocal backlink from PR 9 site, don’t you think?