Question about Skype subscription

[inquisitor]

No, there are some VoIP providers, that will issue an American DID number completely free of charge - no set up fee, no monthly fees, no charge for talktime.

Perhaps the best choice would be poivy.com - they will give you nearly unlimited outgoing calls to North American numbers and to landlines in a couple of other countires in the Western World for 90 days if you just add some € 10 to your account. Those € 10 will actually not expire after those 90 days, but this amount will remain in your account and you can use it for non-free destinations. After those 90 days the originally free destinations will be charged with a still cheap tariff of € 0.015/min. The same price will apply if you exceed 300 minutes of calls to free destinations per week during the freedays-period.
Practically poivy gives you free calls just as a bonus for adding credit, which you may or may not use for calls to non-free destinations.
If you recharge another € 10, you will get another 90 days (which will be added to your remaining freedays, if such are left).
I'm phoning for 4 years with poivy now, and since I usually spend those € 10 on calls to (European) mobile numbers and international destinations before those 90 days elapse. Due to the subsequent recharges I never run out of freedays and even I did, those € 0.015/min would still be a bargain if you consider those 90 days of free calls you had before.
Also they will give you a free US DID number for a one-time fee of € 1, that will never expire.
Sounds very complicated, but it's by far the cheapest I've discovered in 5 years, that I'm using VoIP only instead of a regular landline and they are highly reliable and the voice quality is perfect. There's no difference compared to a regular phone if you use appropriate equipment.
Further poivy also has a callthrough and (a webtriggered) callback service and you can send SMS very cheap through their website.