The Nine of Pentacles reversed shows us a situation where you are stuck in a rut or a vicious circle. This means that you are stuck in an activity that is getting you nowhere and you are not making any progress. This can be symbolic of how you are living your life right now, where you attended a networking event but are getting nowhere.
The reversed Devil indicates that you are not making wise decisions and are not making the best use of the opportunities available to you. You are too involved in your social circles and fail to seize the opportunity when it is offered to you. You're trying to hold on to the security you know, rather than trying something new and taking risks, but this may limit the opportunities you have.
The Ace of Pentacles suggests that even if you are currently having difficulty expanding your contacts, there is a good chance that you will benefit from the network of people you met through last week's networking event. Wealth is symbolized by this card, so the outcome goes far beyond just financial gain; there will also be other types of opportunities that will present themselves.
In conclusion, based on these three tarot readings, we believe that the opportunities you encountered at last week's networking event are really there and you can benefit from them. However, for that to happen you will first need to overcome the obstacles posed by the first two cards and make wiser decisions and expand your horizons. The answer to your question is therefore: Yes, there are opportunities for you in the network created during last week's networking event.