[iMarv]

The title is kind of misleading. The websites and Apps were indeed built with hundreds of lines of code, and are being sold/are for rent on the given platform.

I honestly do not see a big difference compared to other services which offer you pre-built blogs, websites etc.

[kalmi10]

The linked http://builtwithoutcode.com/ appears to be a certified partner of the platform. For the actual platform, check out https://bubble.is/

[onvel]

in fact all those apps and websites were built on Bubble - it's a visual programming platform that allows creating apps without code. There is no code behind those apps. Only Bubble platform. the link is bubble.is