Thank you for seeing my post. Both of those accounts are taking Steem Power, so Vietnamese community won't have upvotes soon. That's why I wanted to warn community before it's too late.
About bots, maybe you're right. But I prefer to lose some money for improving my reputation level. And if people can use bots good, they will gain some revenue as well. It's better than using SBD to buy Steem and Steem Power. Because Steemit is giving revenue in both currencies.