Clients occasionally ask web designers why they only show screenshots of sites that they have built, instead of a link to the website. A client may wonder how smoothly an e-commerce site built by the designer or how well certain plugins work. Unfortunately, the reason some designers won't provide the link is because the previous client altered their website almost beyond recognition.
When you build a website for someone using WordPress, thet can add pages or new posts easily. This allows the client to update their website themselves, without paying for updates, but this has drawbacks. Inevitably, someone in their office knows WordPress and they will offer to refresh the site, with a new color scheme or template. All of a sudden, the plugins don't work or the site's color scheme is all wrong. You can't expect inexperienced clients to understand why you chose certain fonts or colors. Few designers want to add a link to a business site where the client switched the font to comic sans.
Clients may add too much text to the home page, overwhelming visitors. Since it is their business, they feel everything is important, including how friendly they are, which family members work at the family business and they feel that they need to introduce every new product on the home page. The clients lacks perspective regarding what visitors will think it important, which is how the company's products will benefit them.
There are times when designers shouldn't include a website in their portfolio because the client's idea of what an appealing website looks like is unappealing from a usability standpoint. A web designer may patiently explain why a long, flashing into is wrong for an insurance website, but in the end, web designers have to eat. They design the website and take the money.
If a designer wants a fully functioning website to link to, where no one can make any changes, they will have to build it themselves. For more information click here https://www.reddit.com/r/web_design/comments/8pu8e9/why_do_some_people_show_off_their_projects_in/.