If the money would be an issue for the band... why only react 4 years after? I think they didnt even know that they are part of the game... we might be think the game is well known, but lets face it... BeingaDIK is not a game that was selled million and million of times worldwide... especially not in other countries as the US. Cause you cant buy BaD via Steam or gog in other countries. and if iam not mistaken... they are british or australian and not from the States. So its very likely they didnt know about the game so far... i mean... come on DPC contacted them himself at the beginning and they didnt respond for 4 years... yeah i dont think they had a clue about the game in any way until recently... maybe someone they know mentioned that, or they looked after "better times" for themself walking on memory lane and stumbled over the game cause their songs are mentioned a lot on reddit, youtube and co when somebody is posting anything about the game...It's not about fame for them, it's about money. DPC is very successful with BaDIK and earns a lot of money. The band is not so successful. They probably have their current reputation only because of BaDIK. But what they don't have is money.
If DPC would not remove the songs and the laws of the country where the jurisdiction is located would decide against DPC, it could happen that DPC has to pay for the whole time of using the songs.
The band is only in it for the money.
MAYBE they decided they want money from DPC now... that might be the case, and DPC said them "yeah go fuck yourself after 4 years"