According to calculation (not mine that is) with the average rate of acquiring all the necessary resources and the exchange orgy that takes place after, to get to the Rainbow medal - for a completely FTP player, it takes 4 years to get to the point where you can get your waifu.
In 4 years... even if you have just a part time job, its just easier to get one of the DMM coin deals.
Since DMM is quite community friendly I wanted to support, even if a little bit. Took the 5000 DMM deal, took Fritililaria (or wtf is her name, srsly this is a chore just to pronounce never mind writing it ) and have not been regretting since. So far no "pick your Waifu" deal has come our way, but should it, I am considering of going for it to get Loquat in the team. Its not like I am going to whale (table top gaming is expensive hobby that siphons most of the "non vital to survive and save for retirement" resources) but I dont mind dropping some cash their way here and there. After all, unlike Nutaku, they really try to put the effort and keep me satisfied and I dont feel like I "have to pay so I can get a moment of joy within the confines of the game", rather more like "I wanna pay to actually support these guys, and if I get the girl I want in the process even better". Those are the wibes DMM gives, hence thats why I enjoy my time on it. Its over all better. But enough of me rambling