The North American Bitcoin Conference (TNABC), a popular cryptocurrency event set to take place in Miami later this month, is no longer accepting Bitcoin payments to purchase conference tickets.

The decision to ditch Bitcoin—the cryptocurrency the event is centered around—as a payment method was made due to the growing fees associated with individual transactions and increased network congestion causing delays in processing.

“Due to network congestion and manual processing, we have closed ticket payments using Cryptocurrencies,” the event holders, Keynote Events, announced on the ticketing page for the conference. ”Hopefully, next year there will be more unity in the community about scaling and global adoption becomes reality.”

Keynote Events went on to say that it has and “always will” accept cryptocurrencies for their conferences up to 14 days before the event. However, the organization explained, “due to the manual inputting of data in our ticketing platforms when paid in cryptocurrencies, we decided to shut down bitcoin payments for last minute sales due to print deadlines.”

The number of ticket service operators who accept Bitcoin is limited, and convincing them to extend their systems to allow for transactions using alternate cryptocurrencies that carry a lower transaction fee is a difficult task—especially on short notice, as the North American Bitcoin Conference is set to start on January 18.

“Ticket service providers like Eventbrite or others do not have crypto integrations yet. I think within a year companies like Coinpayments, and other payment providers will have better tools, and we will instantly integrate,” a member of Keynote Events told Bitcoin.com .

Without those alternatives available, Keystone Events was stuck processing Bitcoin transactions manually and dealing with the sizable fees associated with them. According to tracking data from BitInfoCharts, the current average transaction fee sits at about $30. That fee can spike as high as $60 at times.

Those fees have created a challenge for businesses that would like to accept Bitcoin transactions. For tickets to the convention, which run $1,000, the fee may not be a dealbreaker. For smaller transactions, that fee could cost more than the item being purchased.

Fees have led to a number of large companies ditching Bitcoin as a payment method. Microsoft recently announced that it would halt support for Bitcoin over concerns of the cyptocurrency’s stability and wild fluctuations in price. The company’s concerns echo those of Steam, a popular video game platform that ended support for Bitcoin last year because of "high fees and volatility."

In addition to the high transaction fees, there is also the challenge of processing purchases made with Bitcoin. According to Blockchain.info , there are more than 160,000 Bitcoin transactions waiting to be processed. Bitcoin’s blockchain infrastructure is capable of processing about eight transactions per second, but the popularity of the cryptocurrency has created a backlog of transactions.

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