The free text poll type has several options.

This will change the size of the text box in the attendee view. Instead of multiple lines, attendees will only see 1 line. This encourages them to be briefer.
​

This will prevent attendees from entering a space so they can only submit one word. This combines very well with the word cloud display type.
​

The results of the free text poll can be shown as a Word Cloud or a Feed View. 

To select which one, expand the free text poll.  Then click on the downward arrow next to the TV screen in the lower left corner. That will expand the Poll Broadcast Options. Pick Word cloud or Answers Feed.

Any “Free Text” poll can be represented by a word cloud. The word cloud is visible during the meeting in the Polls Broadcast View. 

It's available in the presenter's view as well:

You can also view the comments as they come in in a feed view. This is available in Broadcast view and...
​

Presenter view.

The word cloud is also shown on the final report:

The Print-Friendly view rearranges the words into a multi-colored word cloud on a white background.

You can access the comments that generated the word cloud by clicking on the Votes (CSV) link. Go to Polls > Results and scroll to the free text poll. Then click Votes (CSV) to download a CSV of the answers.
​
​

Attendees' individual comments are available on the Detailed Poll report. You can see them by hovering over the dot or exporting the CSV.