There don't seem to be enough details at this time (probably intentional on WTC's part) as they may be testing the waters to see how much pushback they get. It stands to reason that they will implement since this was initially leaked pre-pandemic but not implemented (as I recall).
There are a few scenarios as to how they might transfer funds received from the cong:
1. The accounts servants takes the funds to a bank and gets a certified check which then gets mailed or possibly direct deposited using a mobile app similar to how checks are now deposited remotely using a mobile app. Take a pic, put in the amount and hit send. This would not work with a personal account since the naive publisher would get audited and even accused of money-laundering. Banks are on the lookout for these types of money transfers. I knew a low IQ accounts servant who did just that and he experienced much pain as result.
2. WTC sets up an account at a bank local to each congregation and the Accounts servant deposits the check and cash directly into the WTC account.This is unlikely and problematic.
3. WTC stops accepting cash and checks at the KH altogether. Pubs must make donations online. Hmm...sounds like this is a already a problem as pubs are not donating online enough as it is. So, unlikely to happen.
There may be other options but I can't think of any at the moment. I welcome your creative solutions to WTC's self-created dilemma.
Meanwhile, Here are some likely consequences for the radical change in the money-grabbing plan:
1. BOE's realize that WTC is not going to pay for toilet paper, cleaning supplies and other costly incidentals that add up over time. They suspect that WTC will be too tight-fisted to even pay the electric and water bill so they begin to stop donating altogether. The cash dries up. CO's berate the cong to no avail. WTC sells the KH due to lack of donations and the Pubs are forced to travel to another KH until those congs also wise up and stop donating. The selloff accelerates and WTC declares chapter 11. Disentegration follows rapidly and millions are freed. Unlikely but I thought it was a possibility so I listed it.
2. Watchtower gets investigated for operating as a bank and criminal prosecutions follow. Many cry persecution but disentegration follows and millions are freed. Ulikely also but worth considering.
3. Congs do their darn best to follow the onerous yoke WTC places on them but it unravels as WTC fails to pay the utilities, Pubs get stuck with incidental purchases and bitterness grows. WTC lays off the majority of it's "paid" (stipend) workforce and attendance plummets. Donations plummet. The ex-JW community grows. WTC closes the doors and key men relocate to Argentina as KHs get sold off. This is the most likely scenario but it could play out over years, so slowly that many are unaware that they are ending. If you have watched paint dry, it takes time.
4. WTC uses this as a pilot program and decides that it just won't work. They scrap the plan altogether and wratchet up the pressure on the Pubs to give more of their money. They readjust teachings like the sheep and goats understanding to make Pubs believe that they are being judged now for their actions. (Oh wait, they already did that - nevermind). Depression among Pubs grows and more leave for greener pastures. WTC experinces more shrinkage than George Costanza in an ice bath. Eventually they become a marginal reference in "Religions that Used To Be". The GB have themselves cryogenically frozen but court orders are issued for them to be thawed and the funds are liquidated to lawyers who form a class action against the Corporation(s). This is a dream scenario and probably likely except for the cryogenic part that I threw in for fun.
5. Pubs band together, surround Warwick, breach the fence and occupy the complex until police intervene. The GB are eventually lead away in handcuffs and millions are freed. Well,I can dream can't I?
Think you can do better? Take a crack at it. Just remember that WTC has more lives than Thomasina. Just when you think they are cornered, they pull a 6 ft Harvey out of their pocket and start another chapter of misery. Trust me, I have been in the room...