Burning portions of supplies might affect the value but not that much as there are also holders that selling their assets from time to time and with the stake bonuses where coins that being added as reward can just add up with the selling pressures, though I also on that point where if BetFury will bring fresh ideas on what they are planning to increase the demands of this coin aside from being a staking asset that can give you rewards, something that will bring the interest and will have good numbers of potential holders and investors.
More on future plans that may gather new prospects that potentially join and support this asset, while those believers can continue to hold and stake their coins without being affected by the current market movement.
The main reason why burning doesn't really change the price on short term is the fact that it was already at the team and it was already out of the market. This has been talked about before, if the team already has those tokens, then burning them or holding them doesn't change the market price, maybe psychologically you will feel better about it, but the end result is the same.
Buybacks are important in this case, they do make a change in the market if they ever do it, but the burning of the tokens that are in the holding? That doesn't really make a change on the short term. Long term it does, because it lowers the supply which would mean if the demand stays the same, with less supply, the price will gradually go up.
I completely agree with you, even in the long terms, such type of burn will likely not have any positive effect on the price of the token if the project is not a really serious one.
The only sure way for token burn to have immediate positive effects on the price of a coin or token is to buy the coin or token from the market and burn them, this way, atleast during the buying, demand for the coin increases which can draw the attention of investors to also try to get some profit from the immediate price increase.
Burn coins or tokens that have been previous held by the team will have no positive effect on the price of the token in the market, most especially in a time as this.