I just checked. For my great relief, I opted out of all additional revenue options.

Then I saw that my commission model is "Alamy Gold".

What does it mean for now? What will it mean after the change?

I don't know, until now, with distributor sales you alway got 30% of total gross, not 40% of what is left. For example, 100$ gross, distributor gets 40$, me and alamy get 30$.

JoeClemson is right.
The difference comes from the way Alamy presents the commissions in their tables. In the older table Alamy gives the global commission (70% for Alamy + Distributor => 30% for contributor) whereas in the new table they give the commission after deduction of Distributor commission (40%* for Distributor => 60%* for Alamy + Contributor). So you must understand the 40% commission for Alamy Gold contributor as 40% of the 60%* remaining. That is to say 40%x60%=24% of the licence fee. It is a well known marketing tip.

EDIT:
(*) Pure supposition based on the distributor commission in the older scheme as I did not find any specification for the distributor commission in the new table or contract.

Only bad and greedy agencies punish contributors for not making a treshold revenue. Selling stuff is their responsibility, once our content is accepted it's out of our hands. They have the marketing power to sell those images, so if anything they should get a commission cut if they fail to sell our stuff.

Good point!

I just checked. For my great relief, I opted out of all additional revenue options.

Then I saw that my commission model is "Alamy Gold".

What does it mean for now? What will it mean after the change?

I couldn't figure that out, or maybe I was ahead of the actual change, but yes, I wrote and asked and I'm happy to say, Alamy has real humans who answer emails. I mean with nice intelligent answers when they get down to "what is your question?"

I am also Alamy Gold at 40%, probably based on former sales, until next year.

Starting last month, everything I upload to Alamy is through Wirestock so I get the highest percentages of what small downloads I get now. Alamy used to average $80 commission a DL, now it's slightly higher than Microstock. I might as well get as much as I can of the little that's dribbling back to me from the new owners.

For those who don't understand. I pay 15% to WS but get 40% for sales. For every dollar, I will get 34% through Wirestock, instead of 20% from Adobe on my own. I'm making 14% more by distribution through Wirestock to Alamy in the future. (and lets not forget the one fail, all fail uploads, and the slow credits, which must equal $50?) I get paid as soon as Alamy pays Wirestock, accumulated earnings from all my agencies.

But that's a side issue. YES, anyone who doesn't make the cut off by next July, if I understand that right, and it's not sooner like January, will be getting 20% for sales and 17% for distributor licenses. Not 40 and 34% as the gold will.

Ok, thanks, I didn't know they screwed us there too.

But you probably could have guessed it, right?