I don't think your dumb. You are asking the right questions. A dumb person would have sent the guy bitcoins. As far as use of BTC... That info is free for anyone willing to search around these forums.
Nicely said, i agreed with you about the info, they should be able for free to everyone, most of the time people are buying those stuff cause they're lazy, or just they' dont have the time.
After I made a little joke on your headline, I owe you a proper answer:
None offense taken anyway, thats just i realised to late my question could be silly, mostly about my lack of english skill, but thanks for the proper answer, it appreciated.