No you weren't! you only worked the first week as rank 1! which earned you 1k credits, which is correct, now if you had over 10k merits before week 1 actually finished, you would have been working week 2 as rating 5 and would have received your 50M this morning. You have to work for a full cycle at that rating to be paid for that rating. In real life, if you get a promotion at the start of the month, do they go back and increase your wage for last months hours? of course not!
YES...You start day one at rank 0, 7 days later if you earned enough merits you rank up and receive the acquired bonus, which I had got over 11000 merits,
week 2 I started as rank 5, and have acquired enough merits to be rank 5 next week after Decay and still no bonus of 50 mil credits,
When you get promotion your are paid it at end of month if its a monthly contract, it should also be paid at end of week if its a weekly contract, which this is a weekly event.