The reasons are pretty clear here. Freebitco premium membership benefits were introduced 4 years ago (1400+ days). This is the time since when users started to deposit FUN tokens on Freebitco. And the amount is similar as the users were making the deposits of a certain amount for having specific benefits of premium membership.
Freebitco team was using that address as the cold wallet address for keeping their funds. They had huge amount of funds (BTC, ETH and FUN tokens) in that address just one year ago (
check here). They have moved all those funds from that address though, but now it looks like they are just transferring the deposited funds of the users in that address.
It's a good piece of information. It is too easy to misunderstand a platform. Considering how the crypto platforms scam their users, even the token creators are scamming their users, people have to be more cautious. I think you are aware of the OM rug pull that happened a few days ago. That is an Indian project that scammed its users.
FreeBitco.in does not have a good reputation lately. So, anything suspicious will look super scammy at this point. If they manipulate the market and scam their users, I won't be surprised. They have been criticized many times for their bad service.