Pay to win

There are microtransactions coming. Rainbow stars will allow you to buy consumables using real money, I believe:

"There will be Rainbow Star bundles you can choose to go for if you fancy something on the store. They'll also be on the first-party [PC and console] stores for purchase, and they'll be Rux's primary means of selling items."

Source: https://www.eurogamer.net/articles/2019-09-04-surprise-plants-vs-zombies-battle-for-neighborville-available-in-paid-early-access

But no pay to win features, which is great!