Q: pre-landing pages and OGads LP requests

I'm trying my hand at the whole OGads thing (you know make $ a day etc etc) and i have a few quick questions but first here is how far i am:

-i have 20 accounts all on new proxies and they are all verified and good
-im signed up to OGads and i have requested a page
-https://www.blackhatworld.com/seo/method-make-easy-50-day-using-instagram.874297/page-17 -tahts the tread i am reading through with all information but there are still a couple of questions:
-im buying 20 cheap domains now.

1. Do i just need to request one landing page that i can use with all my accounts?
so i can have 20 domains all lead to one OGads landing page?

2. i understand that it goes like this
IG account ---- in bio have a shortend* that leads too----my own website.xyz-----ogads landing page
in my own domains/websites can i just have a page with a button that says 'click here to get new followers/download'? do i need to ad any other content?
3. i hear a lot of talk about web 2.0s as landing pages can someone explain more on what that is? wouldnt a normal page with a link to my ogads LP work fine?


Thanks!

*shortened URL is not to protect against IG crawlers but too look good since people are less like to click .XYZ domains

I want to know too.