It all depends on the idea anyone has in their head as to what gambling really means, some see any situation that has to do with giving money out to get money back as gambling while some see gambling as giving money out in  hopes to get money, to me they are all thinking the same thing just in their own different ways.

Which ever way they say it, so long you have to give money to get money it can be seen as gambling.

Just that it is not the type of gambling that low thinking minded persons think it is, when i say low thinking minded persons, i mean those who only know very little about bitcoin and how it works and so they tend to compare it to betting, casinos and all other kinds of gambling.

Like i said before, they are all right it just depends on how much the person knows about the words bitcoin and gambling.