This is a very common form of phsing and certainly isn't new. Just report and hide the comments and move on.

A similar suggestion has already been made, and is pending review.

https://steamhost.cn/steamcommunity_com/groups/tf2outpost/discussions/6/618459405717207718/

引用自 •MoonLight•：

which one do i choose
"please select a reason for reporting this trade...."

"There's something else..."

https://steamhost.cn/steamcommunity_com/groups/tf2outpost/discussions/0/558747922562007365/#c540742485382216907

In case you are no longer able to appeal a ban (its associated ticket has been closed), you may email our Head Appeals Admin, ♥HelenAngel♥, at helen@outpost.gg and explain in detail why your ban should be removed. Note that misusing this opportunity may also eliminate any chance of appealing your ban in the future.

Forum rules state that you can't call out users here. Report them on the site/steamrep.

More info is here:
https://steamhost.cn/steamcommunity_com/groups/tf2outpost/discussions/0/558747922562007365/#c540742485382239358

Custom hubs? Do you mean Huds?

From the premium page:

For Paypal payments, we offer three different options which will give you premium for the duration that you pay for. After this duration has run its course, you will have the option to simply re-purchase another package. If you wish to have a recurring monthly subscription, then you will have to use the 'Credit Card' option above.

There are rules in places to prevent unrealistic trades such as the ones you described, just report them and an admin will take care of it.

https://steamhost.cn/steamcommunity_com/groups/tf2outpost/discussions/0/541906989399197672/#c541906989399225643

Unfortunately there's nothing anyone here can do for you, filing a support ticket on the site is your best bet.