Why sololearn delete some IT courses ?

Question

I wonder to know why some programming courses desapear in courses section ? i just finished css introduction and want to start intermediate level course , but ... theres no course such like this
same with java 3 level course ... and many many others
"Moree" user (https://www.sololearn.com/en/profile/11094519) has many different certyficates which is a proof that courses about i talking was exist , and now ain't

Answer 1

They have removed some of the courses to upgrade them

https://www.sololearn.com/discuss/3205527/?ref=app