VGen is a sort of fiver-like site "by vtubers [More specifically, a vtuber known as Muncha] for vtubers" catered towards vtubers, on which contractors can list their services ranging from your usual art assets through to modding your character into a game.

It's a fairly ordinary intermediary. They've gotten into "controversy" this week after implementing some very reasonable buyer protection measures.
Art asset scams are notorious in the vtubing scene, and just as infamous are what I'd call recalcitrant artists - artists who seem to take forever when working on small indie clients' jobs but are suddenly on the ball when doing work for more renowned streamers, with few if any updates to their worried clients about what's going on.
Thus, Vgen has sought to implement a minimum guaranteed delivery date of a 2-year period to create some sort of safety net for clients, as well as restricting users' accounts who have 3 or more overdue jobs for clients.
[
Twitter thread link]

In addition to this, they are changing their default payment system on Stripe to one that pays out based on milestones being met.
Muncha said:
Coming in 2-4 weeks, these are the more heavy hitting features of Buyer Protection that we hope will ensure that client funds are always safe. Thank you for your patience as we continue to work on these big features.
- VGen Payments (powered by Stripe) will be transitioning to a withheld funds system where clients funds aren't released to the artist until the successful completion of the commission (or milestone)
- PayPal will remain the same (funds are immediately available to the artist) but we will be more proactively encouraging clients to dispute after guaranteed delivery date has passed
Over-entitled artists were upset at very basic buyer protection measures for works that can cost clients sometimes several hundred dollars (particularly with models or art assets) and seethed about it on social media. The only real direct changes were that Vgen delayed implementing these new measures until June, and pushed back the guaranteed delivery date to 2 years instead of 150 days.
For a day or two twitter was filled with an assortment of screeds about how this is "literally killing artists" by making them work under realistic delivery conditions.