That's interesting approach. Quick question, if you will:
How can you add people to your board? I thought they have to follow you before you can invite them. So, this is going to work if you already have 200+ good followers to invite, right?
Work on building Accounts.
It's easy to get much followers in a short time.
You just have to build really good looking Accounts.
Watch some of the big ones with 200.000 + because they needed a long time to build that followers.
They had a long time to design good looking boards, when you're lazy you can even copy that, no one cares.
But when you have good looking Accounts in the first place, followers will rush in when you're an active pinner.
When people start to mass comment on your boards, that you have good taste or that they love your style/pins.
People want to be on your boards.
Like uffda sayed, if you strictly remove any affiliate or bullshit spammer from your boards.
You can also have settings that just you're allowed to invite people.
More people will want to join because they see the high quality of your boards without the spammy lookin shit.
That way you get more clicks/repins and more people who will want to contribute quality to your boards.
Because they see the high quality of pins in your boards.
And with the growing numbers of your Accounts your boards also get bigger and more attractive for anyone.