J2O provides the download/ upload option for users to upload their files and let them review to see how good others think they are. Just because some don't like them there is no reason why they shouldn't upload them for others who do so. Fmany newcomers it is alot of fun in building/ maybe managing a hotel and they want to share it with others and are proud of it after it took them days to build it.
There are also other files i really don't like to be uploaded on J2O like all this jj1 remakes but still others like them and i don't whine because they may take a bit space on J2O why don't you just ignore them if you don't like them. They are j2l files like others and maybe even encourage people to use jcs.