Tickmill is providing free $30 welcome account, is there any restrictions in withdrawal after I make profits?

https://www.tickmill.com/promotions/welcome-account

Tickmill is owned and operated within the Tickmill Group of companies. Tickmill Group is authorised in several jurisdictions, including the UK Financial Conduct Authority (FCA), Cyprus Securities and Exchange Commission (CySEC), South Africa Financial Sector Conduct Authority (FSCA), Seychelles Financial Services Authority (Seychelles FSA), Financial Services Authority of Labuan (Labuan FSA). For more details of this broker, you can check our full Tickmill review.

As for the question you asked, we advise you to consult their official customer service to get the latest withdrawal rules as broker's client agreement would change from time to time.