http://www.zeit.de/digital/datenschutz/2013-01/serie-mein-digitaler-schutzschild-vpn-ipredatorarticle about experiences with VPN, short mention of bitcoins to Pay for a VPN. Sounds negative because bitcoin is difficult to use.
Zeit.de is the Website of the big German news paper "die Zeit". i Don't know if the article appeared in the printed Version as well.
Wer schon beim Bezahlen anonym bleiben will, kann auf Anfrage zwar mit Bitcoins zahlen,doch für normale Internetnutzer ist das viel zu kompliziert.
translation:
for anonymity even in the process of payment you can pay with bitcoins on request, but for the average internet user this is way too complicated.
sorry for Bad writing, i typed this on my phone, i usually don't do that.