Unless I missed it, it seems they forget to add a link or instructions on how to actually respond to the question.

818 Removable Hard Top: You Make the Call

The 818S soft top looks good and is VERY weather tight affording owners a good all-weather option even good enough for air conditioning. The demand, however, for a removable hard top has been difficult to gauge, so I've decided to ask the people who have supported the 818 project the most (our customers) a question about the hard top.

Question: Would you purchase a removable hard top for your 818S (the R roll bar is too high)? The target price is $1,999.

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No mention of windows.