You want facts? :confused:
1. You need to colect 8 times a day to match the coin production that you get with just 1 colection. (of course that's no problem if you don't have a life)
2. If the houses are motivated, that 8 times that arcade houses need to colect, rise to 16 times a day... and ~50 houses are not so hard to motivate in 24 hours. (+70 guild members, +70 friends in list, and let's say you are not in war with all neighbours, you can have ~10 support a day from there too) While for arcade houses, motivation is useless...
3. The overpowered combination with St. Mark's (but here is really the great building broken feature, not so much GRH) where you can colect 700-800.000 coins a day. (I have a player in my friends list with 90 GRH (sold his 90 Plantation Houses to build those, not Arcade) - the number of times that StMk give bonus, and when I motivate, 70-80 houses are always motivated, and considering is 24 hours cycle, until colection it can rise to 80-90 houses.) Actually going close to 1M coins a day...
Of course you can also ignore facts, like that player with St.Mark's - translation from english to english - "I sold 90 arcade Houses and build 74 (or something) GRH, I have the same number of population, but it ocupy a lot less space, making room for other structures, I colect once a day, don't have to bother every time to come and colect every hour like with arcade, but my income "only" rise from 250k to 350k a day after the makeover... that's seem about right..."
But then again, overpowered is good, if I'm overpowered... :p