Yes, you can still mine without holding WBT and stay at the STANDART tier. We decided to keep this tier in order to allow quick onboarding for new miners. We understand that as a new miner you might want to test the pool first without any obligations. Think of it as a test drive:)
Once you have finished your test drive and want to stay with us (we bet you will), you will likely want to get the most out of our pool and increase your profitability by moving to the next tier up.