Slow devs, borderline scam. Save your money, they'll charge you for each version whislt adding next to nothing. Just wait for full release or even better pirate it.
are you sure they are charging for each added version or you just don't know how to download the newer versions? because you wouldnt be the first with this problem on itchio
While probably not each version, the description does state that major updates until v0.9 may require additional charges, so if you don’t want that, wait for v0.9. The price right now is very low, since it’s in very early development, so I guess that’s fair.
