For those wondering here is the account which gives out all the invitations (denying everyone else a fair share of rewards or potential invitation rewards):
Note: The developers decided to hide the reward page for this account after members have been calling them out for keeping the invitation rewards.
https://scan.idena.io/address/0xcbb98843270812eeCE07BFb82d26b4881a33aA91It's not fair for them to keep almost 50% of all coins + rewards from invitations they can give out like candy.
The best thing they could do is reward everyone suspended who created flips this last epoch from this account's coins for their lost time.
This would show good faith and fairness on their part.
I bet you're just FUDing, trying to buy at 600 sts which you missed few days ago and those days are now gone.

This is foundation wallet. Funds received in this wallet through invitations are used for funding community development and donations.
Formula for foundation wallet invites is: MAX(50, MIN(validated_identities/3), 500)).
Basically, it's 1/3rd of validated identities, but capped at 500, while users have invites in the sum of half of the network size.
Foundation wallet invites were made so that initial growth can be sustainable, when there were not enough user invites.
The more the network grows, lower is the percentage of foundation wallet invites in whole network. Once a network grows to 5000 nodes, foundation wallet will have 500 invites while users will have 2500 invites. At 10k nodes, it's still 500 for foundation wallet but 5000 for users.
One more thing to point out, foundation wallet invites get invitation reward only for 1st validation (which is 1x base reward), while users get it for 3 successive validations (1x + 3x + 6x) which is 10x base reward.
Therefore, foundation wallet gets 1/10th of invitation rewards of what users get for theirs, and on top of that, those rewards are not private, they're used for funding community work.