You're shifting your trust from A.) a dumb-pipe retailer, who you may not have freely chosen, and who has no motivation to respect privacy, to B.) a privacy p

You're shifting your trust from A.) a dumb-pipe retailer, who you may not have freely chosen, and who has no motivation to respect privacy, to B.) a privacy provider who is easily replaceable and whose entire business is based on quality and integrity. Seems rational to me.