Yup, I think it will be going forward in general betting scenario. You can play 20 times if you want but I was specifically talking about 0.5 BTC main prize in this special promo offer (where the one with the most points wins).

If I find out that you could have entered with 10 tickets I will really be pissed
Because, so far I would have gotten 56 points on one of my picks (2x20, 2x10, 1 missed with no loss multiplier and 1 missed with -4 points). 56 with 2 remaining picks is a strong contender.
In comparison, I switched 2 picks so I don't risk being charged with entering multiple tickets, both were wrong in the end and I have 28 points so far with 2 picks remaining which basically leaves me with no chance.