It makes sense and I don't know websites that require bigger minimum withdrawal compares to minimum deposit so BetHog likely follows a standard in the industry.
The challenge on users is only whether they manage to bet carefully enough for avoiding big loss from their deposit fund so that they will have enough fund for withdrawal that must be not lower than minimum withdrawal value.
I'm not sure about the speed of the respond from the support but I think it depends on their working time, if you request it on their working time then it should be fast but if you request it not on the most effective time then it may take longer.
It can be not instant support with kind of delay and perhaps their support response speed is often lower in weekends than on working days. BetHog is still active with marketing and they need to maintain good and active support for their customers to make sure that fund spent on marketing won't be inefficient money use. To have good effects from marketing, there are other things must be good from the business so that users and guests can have reasons of joining, betting on the casino.