The site is about mere 10 packs. Some jurisdictions allow the personal tax free import of even more than that. Within the European Union, for example, it is 800 cigarettes = 40 packs (200 cigarettes = 10 packs from outside EU). Assuming the "old/classic" size of packs with 20 cigs each.

That will likely quickly make it impractical. How much you can make per unit is pegged by the price differential, where the only way to make more is via volume. The probability of getting caught scales super-linearly with volume, unfortunately, and the consequences also.

Furthermore, the medium in question (passenger flight) places practical limits on volume, and raises likelihoods for getting caught. E.g. a large suitcase full of cigarettes is much riskier through an airport, than the same amount of cigarettes tucked away among a lot of other stuff in the back of a 1 ton truck going over the border.