Realy not sure what was the thing with the sell wall .... PAL did it and most followed .... but if you think of it, it puts pressure on the price in the same way as STINC on STEEM .... the main income for tribes would be miners sales .... not token sales
A buy wall would make a lot more sense :)
Although that requiers initial investment... but that how buisness is done .... and then use share of the miners sale to further buy and burn tokens ....and hope in a year or two to have a token valued ×100...
I'm thinking you should burn the sale wall ASP