slot promo says avalanche games count but my cluster pays spins barely moved wagering.

Took up one of those slot promos that says “avalanche” games are allowed for wagering, so I picked a cluster pays slot that drops new symbols after a win. Got sucked in thinking it would chew through the WR quick. Nah. Noticed after like 50 spins my progress bar barely nudged. For sure the game says avalanche in the description and it acts just like Gonzo or those style games, but now I’m wondering if cluster pays doesn’t work the same as lines or something for promo tracking.

Anyone else had this with cluster pays slots? Do casinos treat these differently for wagering even though they’re avalanche style or am I losing my mind here?