Not a surprise to be completely honest. The amount of ETH wallets being created solely for bounties and airdrops are still getting higher and higher by the daily for sure, along with the number of newer airdrops and ICOs being created. And also, people making ETH wallets also for when investing in ERC20 tokens.
Yeah, a lot of ETH address are being created mostly to use in bounty and ICO investment but I believe almost half of it are being used to scam people and to cheat on any bounty campaign. There is really no doubt about this thing but it doesn’t mean bitcoin address is not good.