Public access to the web came through dial up services like CompuServe, AOL and Prodigy.  There were numerous dial up BBS services.

The very first public sites on the Internet were dynamic forums. 

People of the Web 1.0 ridiculed static web sites as online brochures.

The dynamic forums were quickly followed by online shops like eBay and Amazon. eBay is an auction house. People buy and sell through dynamic auctions on eBay. There were numerous classified ad sites.

Unfortunately, people were reluctant to give their credit card numbers to small web sites. Local states had to charge local sales tax. So people wanted to shop out of state to avoid the tax. The sad result is that Amazon came to dominate ecommerce.

I worked for a telephone company. Our site let people pay their bills, review their voice mail, send text messages, etc.

Most of the early sites were dynamic.

Google came along. The PR algorithm of Google favored static pages which were keyword rich. The Web Archive archived static pages. This might give the illusion that the web was flat, but it was dynamic.

Google favored blogs to online forums. I guess you could call blogs read only. Most blogs allowed user comments and included guestbooks and featured things like Webrings.

Spammers attacked routinely attacked any open feature on a blog and blogs reduced their use of community features.

The term Web 2.0 was used to describe web sites designed for smart phones. Twitter was initially built on the concept of text messaging which is why they had the 144 character limit for tweets.

The claim that Web 1.0 was nothing but static pages is an outright lie.