How did you know that they have no plans to add internal exchange? I think, if the betfury team sees that there are a lot of players that are requesting for this feature, they will consider it. I agree that you can request slow withdrawal for btc. But if you happen to have few dollars worth of eth, it is not advisable as the current withdrawal fee is almost $10 now, basing on the current rate of eth as 1958. So your small amount of eth will just be there sitting on your wallet while waiting to accumulate more eth or if the fee will decrease.
I went in livechat a couple of times to ask about the internal exchange. But I can agree, it is a very interesting feature but not a lot sites offer this kind of service.
It depends on mempool size. So, if mempool is not overloaded, then 7.5k sats should be enough for your withdrawal transaction, and it will get the first confirmation within few hours. Otherwise, it will take several days.
Received it after 6 hours, so mempool was not overloaded
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If a lot of their players will express interest of internal exchange, I believe they will consider it. Maybe not today, but in the future. And I think they also have small time players holding small amount of coins, which they want to convert it to other alts available in their platform to incur small withdrawal fee. But okay, right now, just accumulate those coins while you are staking your bfg tokens, and in time, it will be good for withdrawal.
That's great, knowing approx time for about 7500sats withdrawal fee on their platform. But also, check the mempool activity, if it is not so busy, maybe it is better to cash out your satoshis and maybe will be less than 6hrs waiting time.