Search engines now know of this technique and define it as "spam". Currently, sites that use invisible text are banned from most of the major search engines.
The following techniques are spam:
Meta refresh tags Invisible text and overuse of tiny text Irrelevant keywords in the title and meta tags Excessive repetition of keywords Overuse of mirror sites (same sites that point to different URLs) Submitting too many pages in one day Identical or nearly identical pages Submitting to an inappropriate category (for directories)
