Share holder & WXT holder cashback rewards?

so holding 100k WXT gives you 1% cashback. now if you invested into Tier 2 at crowdcube £500+ you still only get 1% cashback right? why doesn’t it stack up for 2% (1% for holding 100k & 1% for being a share holder)? i think this would be highly recommended to compete with other similar companies. 1% cashback for share holder + 100k wxt holder sounds very little to me… competitors are offering 1% for free these days.