Saying i just want an incentive sounds to me just an excuse to get free stuff. Multiple people have listed in this topic all the differences between the free demo and the patreon version, and they continue to give out infos about the updates as they go. It's paying to support the content you tried and enjoyed so far.

Patronage shouldn't be considered paying to get an update. To be fair, if someone is asking for the patreon version just to 'see what's new' to get an incentive, chances are he will probably grab the copy, don't pay anyway and then wait for someone to share the fully released game.