You can still get the 7.5 gold from the first 2 links every 6 hours for the other 3 times you can vote.
Cubi (in Gold) is listed below per server. 10000 cubi (Bronze) = 100 Silver = 1 Gold. It is possible to have Bronze cubi, but not on this server with the current items & pricing in the boutique.
Link 1: 5 gold per 6 hours (20 per day assuming 4 votes are inputted correctly)
Link 2: 2.5 gold per 6 hours (10 per day assuming 4 votes are inputted)
Link 3: 2.5 gold per 24 hours.
Every day, you can vote once on All 3 links for 10 gold. Total gold value IF you don't sleep & get all 4 votes: 32.5 gold.