In my experience this isn't true at all, at least if you target startups and SMB. We have a task management product which is used by many lifehackers around Eur

In my experience this isn't true at all, at least if you target startups and SMB. We have a task management product which is used by many lifehackers around Europe, and we get requests about iDeal or Giropay only occasionally. We also have an intranet/wiki product which is sold to businesses in the 5-200 people range and everybody pays with a Credit Card no problem (OK, a few prefer wire transfer). If you have a B2C company where you want to charge €10 or so then alternative payment methods may become an issue. But if you sell SaaS subscriptions for €50 or €200 a month a Credit Card is still the way to go, even in Europe.