Why does email say I "recommended" Trello for board I shared that forced recipient signup?

[kierra_pvm]

I received a confirmation email from Trello stating the recipient joined on my recommendation.  How untrue! I would have used another platform had I known prior to using this service that sharing a board forces signup. Why isn't this made clear or have a popup when submitting the email to share? My client is not tech savvy, and this almost cost me the deal. 

[Alex Waite]

Hi @kierra_pvm - when you invite someone who doesn't have a Trello account to your board, they use email invites to then create an account. This is outlined in our help docs: https://help.trello.com/article/717-adding-people-to-a-board