This is all
semantics.
When people refer to "deck", they usually mean deck + mark. It's just easier that way. Having to say "go change your deck and mark" would be ridiculous. Marks are a big part of deckbuilding so it's natural to assume that when you are prohibited to change your deck, mark is included in that.
Then there is this group of people who don't like the mono-deck definition. First of all it's a definition used only in forum structure and forum events. It means nothing inside the actual game, and in the privacy of your own home you can define mono-deck however you want.
The reason mark has no affect in whether or not the deck is a mono, is because if mark
did have an affect, some of the cards would be unusable because they would have abilities that you cannot pay for. For example if you do a mono-
, you can't use Rustler or Forest Spirit.
Think about it. You build a deck using only one element, but you cannot even use all the cards in that element. Not only would it be boring, but it would also put elements like
in a huge disadvantage because they use more outside elements.
I think most people who complain about deck definitions either..
A) Haven't actually taken all things into consideration (first complain, then think)
B) Don't have any better ideas
Or both.