If support is your motivation, then you should be glad that Snapshot has resurces to work longer on the game, release it in better state, hopefully get a good release critical and consumer reception and get a pretty decent amount of sales.
If being the first player interests you, no pre-order are needed - digital media aren’t limited, and you can safely way until reviews are out and buy it on day one and play at the same time as early pre orders.
And if you are interested in over-priced, exclusive alpha builds - there is a pricey premium edition of Phoenix Point there for you 