It was 3.99 USD with a timer after which it was supposed to cost 4.99 USD. Instead they raised the price to 9.99 USD before the timer for the discounted price ran out.
yeah, the whole thing is weird. They ran out of keys halfway through (there was a notice that went like "whoops, this bundle was more popular than we expected and ran out of keys"), then they restocked but raised the price way higher than anybody expected and it seems also too soon, before the timer hit 0. And now the bundle page says "Pay
$9.99 or more to get this bundle
full of Steam games and
SAVE 94% OFF" except I did the math, and unless I'm looking at something wrong, at $9.99 it's only 85 % OFF, whereas for it to be 94 % OFF the price would need to be $4.99, which seems to have been the plan and nobody has fixed the wrong % after they decided to go with 2x the price as planned