The SSL certificates issued from Let's Encrypt are maybe free and they will stay free but this doesn't prevent us to sell our plugins for i-MSCP. The Let's Encrypt plugin for i-MSCP will not be free.
After, all, we spend hours to develop i-MSCP for free and we gain money with our plugins and online support only (we have not so much donation).
isnt that the exact reason why @MichaelSchinzel is offering to sponsor this so that it CAN be free?