All you need is any Scratch-Off Ticket (either green, orange or gold)

And any body of water. That could be the ocean, a lake, anything that makes you respawn to your previous position.

Have the Scratch-Off Ticket in your hot-bar slot and also have an empty slot. (this is important if you dont want your items deleted)

Then stand next to the water, then jump and dive into the water. Right before going in the water, you open the scratchcard.
After you have done these steps, you have to click on your empty slot. The reason is that scratching the Scratch-Off Ticket while holding it just deletes the item from the selected hot-bar slot. so if it's empty... yeah.
After clicking the empty hot-bar slot, you can now scratch the Scratch-Off without it disappearing!

You should now be able to get infinite money in WEBFISHING. There is no more i need to tell you, hope you liked the guide and make sure to give 5 stars and awards if it works for you.