Warning: The following suggestions may be insultive, and should they be, you ought not to have read them.
...But please, do go ahead and read them nevertheless.
Pre-purchase versionsThe top priority of the campaign should be to make money; the donations themselves are just too little to cover up everything. Since there are some idiots who are too impatient to wait for the next version, why not create a payment system to allow these hasty fellas to satisfy their addiction by pre-purchasing the versions in advance?
Say, with 0,50$ charged for every minor and 2,50$ for every major version, a decent profit could be made. These versions should then be released officially a week after the pre-purchase versions to encourage everyone to buy them. Those few who actually wouldn't pre-purchase could then be named as "Free to Play" -players.
Automated help serviceWe all know it; the campaign is too hard to be comprehended for an averagely intelligent player. Therefore, it's constatly seen as a stream of help requests that consume our valuable time. There has got to be a solution to reduce the numbers of these damn folks. And here it is:
Automated aka bots as the help service. When the player in need of help asks a question, the bots automatically redirect them to pre-written answers and solutions, so all there has to be done is to write the answers beforehand. And should there be questions that are not already answered, well, who cares? It happens so seldom anyways, given those players.
Replay valueOne very simple way to increase the game's replay value by A LOT is to make the players farm more and more. It doesn't need much of a description here; raise the item and recipe prices by 50 times to effectively increase players' replaying of the campaign by 100 times (since they want to get two units of each item, one to be used on business days and the other to be used on holidays).
-A parody after Michael O'Leary's statementsFly on, Michael! ;) And hope you didn't take it serious, reader.