I am not a fan either, but I can understand the logic and since it is, or well it can be, a F2P game, it’s in their rights to throw at you their offers (not the first, nor the last game that does it, come to think about it, I think over 90% of the games I’ve played have done this.
Since some people might miss some offers if this ‘feature’ gets removed, I highly doubt they will change it.
- You should be able to press the edit button and change it. Either change some digits, delete it all together etc
- Use a different payment method if that doesn’t work or even better, remove them all.
- Use a password for when you purchase something. (This one should be the best option).