The upvotes are now using factors of ten.

1 to 9, = 1 upvotes,
10 to 99 = 2 upvotes,
100 to 999 = 3 upvotes,
1,000 to 9,999 = 4 upvotes

So tipping to effect a rise in a post's rank is (without "wasting" sats) optimally 1, 10, 100, 1,000, etc.