One of the most unique things I've done is sell Bio4 leveling. Originally it was for free, but then I met a lot of players who have an even more busier life style than me but are willing to pay for efficient leveling.
With my knowledge, I was literally able to make 1-2bil a night running 4-6 rounds of Bio4. I was even able to fill up all my accounts and my other friend's accounts with 8k+ WPE. To give you an example, I fill up my party with 5 important classes (AB, strings, sorc, gene, and RK) and fill up the other 7 with all buyers. Each buyer pays 50mil per round. If I do 5 rounds (which for me takes less than an hour and a half) it will be an easy profit of 1.75bil. PER NIGHT.
There is so much money you can make in Bio4 with saving time. I can write a complete guide for the details, but honestly for any party, just offer to sell spots. Players WILL buy if you feel your party is confident in finishing under a reasonable amount of time (doesn't even have to be under 30 minutes).
I find that the best buyers were those in Asian countries (phillipines, thai, latin america, etc) since they generally purchase more WPE to sell for zeny.
Again, if people truly wants to see a guide on how I do it, feel free to let me know in the comments and I will consider creating a detailed guide.
Bio4 is honestly fun, as long as you make the party run efficiently. And that's all I did. Whenever you see an opportunity to fill up an empty slot or find a group of friends, consider selling a spot in Bio4! Put up a chat that says "S>Bio4 Runs!" will get players interested in it if they feel they can trust you.
Here is a screenshot of 1 night of Bio4 runs, starting at 32mil zeny. The other is the transaction of WPE made off of a single night of Bio.
Edited by Demeris, 25 June 2017 - 07:52 PM.