This is probably because you cannot do a 20 Day combine anymore.
$30,000 Starting Balance
$175 Deposit
Duration: 10 days
Max Position Size: 3
Daily Loss Limit: $500
Max Drawdown: $1,500
Profit Target: $1,500
https://www.topsteptrader.com/learnmore
They do offer Russell futures for funded traders.
http://help.topsteptrader.com/knowledgebase/articles/182826-as-a-funded-trader-can-i-trade-products-that-were