It's just an advertisement, and it mentions:
1) Chesslang
2) Shortcastle
3) Paychessentry
4) Coach's dream tool
5) No mention of a student's dream tool
6) Pricing plans which start with $100
7) Grammar mistakes like "If your a director".
What is it? I see all of it covering 30% of the center of the screen with 30% blank margins on left and right. The text under the pricing is way too small to read.
I suggest they change the way they advertise and tell exactly what it is. If it is not a useful tool for $5/month, then it's not for me.
Check out this review https://www.chesstech.info/2019/04/chesslang-shortcastle-web-based.html
What do you think?