Pros
Completely flexible in terms of workload; enough demand that this could be a full time job if you are that way inclined. Continues to improve it's employee value proposition by increasing earning potential (introduction of tips, expedited orders & new order types) The ownership / admin staff are very responsive and quick to solve issues.
Kontras
With the pay after 1st draft model, there is a chance to be ghosted without pay after 1st draft. However, follow the process & do good work and this is minimal; circa. 5% for me when I've completed a draft without payment. They also recently introduced a reduced guaranteed payout for Senior Writers in this scenario which was a nice gesture. From a client perspective, there doesn't seem to be any quality control; whenever I receive an order that is reassigned from another writer or has used TopStack before, I'm often surprised at how bad a job the previous writer did. I guess it's luck of the drawer for the client and the pay after model should somewhat mitigate this?