Huge increase in price..

So, every time I have passed 500 levels, I have for a long time been offered to buy 100 Gold + some boosters, at a very favorable price, 39 DKK, in my currency. I have made use of that offer frequently over the past couple of years.

Yesterday I passed lvl 10,000, expecting this offer again. I did get an offer, but now it's suddenly 89 DKK, for the exact same offer.

That's a 250% increase in the offer price. I could understand a small increase, but that's ludicrous.

It's even worse than when my Golden Ticket offer increased with 75%, only giving a little bit extra.

I know no one is obligated to spend money on this game, but with the greed this game suddenly shows recently, I wonder how much the sales decreased.