Do not attend !!
I was contacted by recruiter who gave me a hypothetical product with 5 massive research topics like GTM, Product improvements, UI UX etc which includes a year level planning and a lot of new ideas which will benefit the company.
I sent the finished assesment late by 2 days as I was out for emergency which I clearly informed, finished it with great difficulty in between. However, he never replied even for courtesy sake.
Stop being arrogant and do not waste candidate time and efforts to get free ideas for your product