Is it just me or are providers getting quite spammy as of late? I on average get a letter a month from one of the below providers. I'll edit this post as I get them. They're always addressed "to the householder" with no opt-out. The timeframe for these letters are the last 8 months.
Trustpower - 8 letters received (average 1x/mo).
Vodafone - 4 letters received promising 3x faster broadband than I already have on 2x of them (so, 600Mbit? I don't read them to find out).
Slingshot - 2 letters received.
Orcon - 2 letters received.
I opened the latest Orcon letter offering 2mo free, $95/mo on 100/20Mbit linking to this page. 12mo contract with a $250 break fee also excluding landline. With BigPipe you can get the exact same for $79 per month, 2mo free and no contract.
All the offers I've received so far are not at all appealing...