As it stands with user upgrades, the admin has to create options with specific amounts.
On any site that relies on donations, the amount that each member can and is willing to donate (and how often) can vary greatly.
For some £5 may be generous, and for other £50 my be nothing.
In order to have the ability to buy user upgrades at various prices an admin has to guess what values users may wish to donate and create corresponding options.
This can result in a large confusing list to users, especially if you want any kind of variation on the length of time the user upgrade will be active for.
I think it could be very useful to a lot of sites if admins could have the option for users to
name your price on the user upgrade they're about to buy. This will make it much more like a donation, and the user won't feel pressured to buy a specific amount, or feel put off or demoralised by seeing high value options an admin has created in the off chance one of their more well off users wants to donate more money.
A big reason why I'd like this in the core is so that it can tie into the new payments profiles system. A lot of donation add ons in the past only allow paypal, and you specify a paypal address, the problem with that is many users can't use paypal or have sworn it off after bad experiences.
Now that we have stripe and others, it means users that are unable or unwilling to use paypal can now use credit cards and apple pay. This opens back up the prospect of receiving funding internationally from these user, allowing them to monetarily contribute to the community if they wish to do so.
You could set a minimum, or min and max limit like name your price features for ecommerce stores.
This also of course makes it easier to make money from the forum, meaning more successful XF sites, and more licence sales
