I ended up getting 117 regular foil and 8 gold foil with my 125 vouchers. I didn't even think to do them in batches. I was able to get my regular foil up to level 6 but I will have to buy more if I want to max it out. I like that they are rewarding stakers. Benefits for land would definitely be cool.
That is a very high pull rate for golds!! I did ~5x as many, got ~3x the golds.