I guess it's not an error typo, You can see the next statement from the campaign manager (StaveStake)
Yes it's for real and he's kinda pissed off.
This campaign is aimed towards Legendary/Hero members, adding Sr and Full is just a small addition. If you don't like the price simply don't join. There's no need to put spam between other people's applications and spread false information confusing people. The price is as posted.
New signature campaign
NanoGames.io Signature Campaign Sr./Hero/LegendaryPayment
Sr. Member: 0.0001 BTC/post ➡️ 0.005 BTC/week
Hero Member: 0.00015 BTC/post ➡️ 0.0075 BTC/week
Legendary Member: 0.0002 BTC/post ➡️ 0.01 BTC/week