I think a lot of the users on the forum are still in the beginning of earning bitcoin so it is pretty hard to find someone who has 1 btc, and if they do have it they didn’t work for it they just bought with fiat or they have been in the business for a really long time, because there is no way to make 1 bitcoin without spending money.
Maybe some people are capable of earning bitcoins from multiple freelancing opportunities to make 1 bitcoin in quick time, But for an average Joe, it is still a hard task with respect to current bitcoin prices.
I think that you can surely reach 1 Bitcoin even if you don't spends some fiat on them you will just need to be Hard working and patient in dealing with all problems involving BTC, let's just say it is much faster acquiring 1 Bitcoin if you buy it with fiat money, but you can totally grin for it if you want to.
Seeing on the current situation i could say bitmixer does have the most strict rules specially to its campaign manager and i saw there are lots of members being banned every week which you cant see on most signature campaigns which means if you are a spammer and tend to join on that campaign then be ready to be on the list on SMAS. Most campaigns does have common rules and it depends on the manager on how they would handle it.
Well you are right about it I can say that Bitmixer has a high reputation when it comes in banning or kicking their members when they have seen that most of his post are just spam and not in a correct topic I guess which a lot of people are really aware of about bitmixer.