Is there a way to buy coins in small increments?

[Is there a way to buy coins in small increments?]

Wanted to gift the exploration pack to a friend for 1760 coins. I have 710 coins but if I buy the 1000 coins I'm going to be 50 coins short and the 2200 coins are way out of my budget right now, is there a way to buy those 50 extra coins? Sorry if this isn't the right place to post this but I don't know where else to ask.

[Account name change / character name]

Hello! I tried searching for a way to change my in-game name and apparently the only way to do this is creating a topic here in the forums. It would be very useful if you were able to do this in game more than once (maybe once every x days?). I set my name to "SirVolpe" back when the game launched because I thought I was creating a character name and would like to change it to "Volpe", "VolpeBR" or "VolpeDasFuchs" if possible. Also on the character topic, I tend to roleplay in-game a lot so a way to create characters that show their name in game instead of your account name could be very useful for that!