Anyway, it takes a long time until ROI... By my calculations, about 8 years, considering a margin a little above 12% interest yearly. On the other hand, for big BTC investors it must take less. The more Bitcoins you have in your balance, the faster you hit ROI.
8 years to achieve ROI from our investment is certainly not a pleasant thing for investors, but certainly, many investors are reluctant to cut losses because they consider other things that can be obtained from freebitcoin such as daily wof and also what you do by saving Bitcoin here to earn interest daily and will get additional interest due to premium membership.
I have sold more than 50% of my fun token ownership and currently only get 4 wof every day, I haven't thought about selling the rest because I hope to get greater benefits from wof.
It's bad that Freebitco.in on personal stats page don't display what we got from WoF in total. It would be interesting to know how much exactly I received through WoF spins and how much % ROI I reached through it. When I bought FUN tokens I really didn't counted on that FUN token price will skyrocket one day, I was more thinking about Premium membership benefits.
Maybe freebitcoin could consider adding a feature like that or stats which would really help investors so they can see how much benefit they get from premium membership, but it's certainly not an easy job for this casino developer. I once recorded it manually but it was quite tedious.