To give you the most relevant info on this, I'd need to know:
Relying on others means not understanding why a player is selected, making it harder to make pivots if news breaks late. How to Evaluate a "Buy Lineup" Service Transparency: Do they publish their past, audited results? buy dfs lineups
Access to better data and sophisticated tools can help bridge the gap against professional players [2]. To give you the most relevant info on
Lineups generated by software that maximizes projected points while staying under the salary cap, often tailored for specific contest types (Cash Games vs. Tournaments/GPPs). Access to data models and projections that predict
Subscription fees can eat into your profits, meaning you have to win more often just to break even.
Access to data models and projections that predict player performance, often deemed more accurate than free, public data [1].