What's also great about so much delegation to those dapps is that those dapps and communities gives upvotes to its members and they also provide value to Steemit as a whole. SteamCleaners for example helps weed out the bad players, who spam and post links to websites that are shady boots.

The value of one's vote is based on the amount of SP the person has and the value of Steem in the market. But more in the blockchain and some dapps having lots delegated to them does not make my vote go up or down. I don't think such delegations are a bad thing. I'm all for it, if it brings value to the communities it supports, which in turn bring value and contributions to its members who contribute in that community and encourages more engagement.

Edit: Resteemed :)