Because these 2 coins are the most used and popular ones. I will share your feedback with our marketing team.
Those are the most popular and used cryptocurrencies, but those are also the most expensive for transaction fees. Sometimes it takes a long time to get network confirmations. So few players try to avoid the transaction fees and also don't want to waste their time by waiting for the network confirmation. I know livecaino credit deposits even with zero confirmation. Still, It depends on users' choice. So, If you can enable weekly rebates with every available coin, it will be great.
For BTC it is actually not an obstacle anymore because we can use the Segwit address for transaction fee is around $1 only ETH is still expensive
But I still support that weekly rebate is available for all coins based on their deposits method or can be converted into USDT to get a stable value
Oh glad to see the multiplier contest not applying a min bet I will definitely try my luck there