the coordinator or whoever you talk to about how often recipients in 1:3 end up with only a 1:2 and the third "recipient" is the clinc itself getting any eggs (as frosties I think) that are left over. I know that at least as of a few months ago they were doing this, as SG was one of the clinics I considered and I was specifically told this when I called to inquire.
If they do this sort of thing often the 1:3 may be worth it as the price is better yet technically there are only 2 patient recipients, so you wouldn't have to wait forever for a third. I think once they get two 1:3 recipients lined up there is an amount of time they'll wait for the third (a month?), and then they move forward with SG as the third recipient.
Best of luck, FB. You have been through so much, and I am hoping you have success very soon.