I think that they are essential as the whole purpose of the page is about some special offer from some organization to members of the TT Club. While the preserved part is the description of that organization, the marked up blocks are the offer itself (which is essentially the main part of the article) and the contacts of the organization (which are essential if you want to accept the offer).
Log in here to create Instant View templates. Please enter your phone number in the international format and we will send a confirmation message to your account via Telegram.
The IV is missing marked blocks from screenshot: http://i.imgur.com/5NM4nes.png
I think that they are essential as the whole purpose of the page is about some special offer from some organization to members of the TT Club. While the preserved part is the description of that organization, the marked up blocks are the offer itself (which is essentially the main part of the article) and the contacts of the organization (which are essential if you want to accept the offer).