I personally would not use the method.
Ask yourself why you are doing it - and if it is ONLY for google - don't do it.
All your competitors will report you for hording pagerank, deceptive redirects, and whatever else they can whine about.
You should be afraid to link to other relevant sites. You are NOT losing traffic - you are qualifying it.
People get to webpages all sorts of ways - many that YOU would never do.
If you have multiple options - you will make more sales.
For example - I have a site on - shall we say "Big Widgets". Almost all my traffic to that site comes through text links that clearly say it is about "Big Widgets".
Despite this - I put a link to another site I have about "Samll Widgets". This works well. I also have links to "blue widgets" and "smooth widgets". This allows people to see what I have - and then pick something else.
The real way you lose traffic/sales - is by people hitting the back/exit/home button or typing in a new site.