I'm not from Bulgaria but I think what was said is that you depending on profitability of your company you can pay out a part of the profit as a dividend (using the lower tax rate until the cutoff) and then the rest as a salary.
It's not one or the other. As a company owner you can use both the dividend and pay yourself a salary.
While I def agree that those are not mutually exclusive and I considered paying myself a salary, but paying a salary still involves a bunch of extra taxes, which end up being more than the dividend's 5%. At least that's what I had from my accountant, but I'd be happy to know details of how to make the combination of salary+dividends to require less taxes than just dividends.
It's not one or the other. As a company owner you can use both the dividend and pay yourself a salary.