Yes, because they are hosted website builders – your website only works on their servers. If you use something like UltimateWB. there is not that problem, as you can download the website builder and your files, and host your website on UltimateWB web hosting or another server.
Got a techy/website question? Whether it’s about UltimateWB or another website builder, web hosting, or other aspects of websites, just send in your question in the “Ask David!” form. We will email you when the answer is posted on the UltimateWB “Ask David!” section